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	<id>https://cof.canolfanuwchgwyrfai.cymru/index.php?action=history&amp;feed=atom&amp;title=Dyffryn_Gwyrfai</id>
	<title>Dyffryn Gwyrfai - Hanes golygu</title>
	<link rel="self" type="application/atom+xml" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?action=history&amp;feed=atom&amp;title=Dyffryn_Gwyrfai"/>
	<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Dyffryn_Gwyrfai&amp;action=history"/>
	<updated>2026-05-16T12:48:39Z</updated>
	<subtitle>Hanes diwygio&#039;r dudalen hon ar y wici</subtitle>
	<generator>MediaWiki 1.43.1</generator>
	<entry>
		<id>https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Dyffryn_Gwyrfai&amp;diff=15312&amp;oldid=prev</id>
		<title>Irion am 18:18, 9 Ionawr 2024</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Dyffryn_Gwyrfai&amp;diff=15312&amp;oldid=prev"/>
		<updated>2024-01-09T18:18:45Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;cy&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Fersiwn hŷn&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Fersiwn yn ôl 19:18, 9 Ionawr 2024&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Llinell 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Llinell 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Dyffryn Gwyrfai]] yw dyffryn [[Afon Gwyrfai]], sy&amp;#039;n rhedeg o bentref [[Rhyd-ddu]] i gyfeiriad y gogledd-orllewin nes cyrraedd ei haber yn y [[Foryd Bach]], gan ffurfio ffin draddodiadol plwyf [[Llanwnda]], ac yn wir [[Uwchgwyrfai]] ei hun, yr holl ffordd o darddiad yr afon yn [[Llyn y Gader]] i&amp;#039;r môr. Mae ochr ddwyreiniol y dyffryn yn rhan o gwmwd [[Isgwyrfai]], gyda phlwyfi Llanfaglan, Llanbeblig (Treflan a Chastellmai), a [[Betws Garmon]] yn cyd-ochri â Llanwnda.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Dyffryn Gwyrfai]] yw dyffryn [[Afon Gwyrfai]], sy&amp;#039;n rhedeg o bentref [[Rhyd-ddu]] i gyfeiriad y gogledd-orllewin nes cyrraedd ei haber yn y [[Foryd Bach]], gan ffurfio ffin draddodiadol plwyf [[Llanwnda]], ac yn wir [[Uwchgwyrfai]] ei hun, yr holl ffordd o darddiad yr afon yn [[Llyn y Gader]] i&amp;#039;r môr. Mae ochr ddwyreiniol y dyffryn yn rhan o gwmwd [[Isgwyrfai]], gyda phlwyfi Llanfaglan, Llanbeblig (Treflan a Chastellmai), a [[Betws Garmon]] yn cyd-ochri â Llanwnda.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Rhed Afon Gwyrfai trwy lyn dyfnaf Eryri, sef [[Llyn Cwellyn]], sydd ar waelod y dyffryn hanner ffordd rhwng Betws Garmon a Rhyd-ddu. Mae Llyn Cwellyn yn llyn naturiol ond mae wedi addasu fel cronfa ddŵr ar gyfer Caernarfon a&#039;r gymdogaeth.  &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Rhed Afon Gwyrfai trwy lyn dyfnaf Eryri, sef [[Llyn Cwellyn]], sydd ar waelod y dyffryn hanner ffordd rhwng Betws Garmon a Rhyd-ddu. Mae Llyn Cwellyn yn llyn naturiol ond mae wedi &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;cael ei &lt;/ins&gt;addasu fel cronfa ddŵr ar gyfer Caernarfon a&#039;r gymdogaeth.  &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Prif ddiwydiant y dyffryn (ar wahân i amaethu) oedd chwarelu am lechi ar y ddwy ochr, a chloddio am fwynau megis haearn, yn bennaf ar ochr Isgwyrfai y cwm.&amp;lt;ref&amp;gt;Gwynfor Pierce Jones ac Alun John Richards, &amp;#039;&amp;#039;Cwm Gwyrfai&amp;#039;&amp;#039;, (Llanrwst, 2004), &amp;#039;&amp;#039;passim&amp;#039;&amp;#039;.&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Prif ddiwydiant y dyffryn (ar wahân i amaethu) oedd chwarelu am lechi ar y ddwy ochr, a chloddio am fwynau megis haearn, yn bennaf ar ochr Isgwyrfai y cwm.&amp;lt;ref&amp;gt;Gwynfor Pierce Jones ac Alun John Richards, &amp;#039;&amp;#039;Cwm Gwyrfai&amp;#039;&amp;#039;, (Llanrwst, 2004), &amp;#039;&amp;#039;passim&amp;#039;&amp;#039;.&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Irion</name></author>
	</entry>
	<entry>
		<id>https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Dyffryn_Gwyrfai&amp;diff=13216&amp;oldid=prev</id>
		<title>Cyfaill Eben am 13:18, 27 Mawrth 2022</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Dyffryn_Gwyrfai&amp;diff=13216&amp;oldid=prev"/>
		<updated>2022-03-27T13:18:02Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;cy&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Fersiwn hŷn&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Fersiwn yn ôl 14:18, 27 Mawrth 2022&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Llinell 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Llinell 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Dyffryn Gwyrfai]] yw dyffryn [[Afon Gwyrfai]] sy&#039;n rhedeg o bentref [[Rhyd-ddu]] i gyfeiriad y &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Gogledd&lt;/del&gt;-orllewin nes &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;gyrraedd &lt;/del&gt;ei haber yn y [[Foryd Bach]], gan ffurfio ffin &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;traddodiadol &lt;/del&gt;plwyf [[Llanwnda]] ac yn wir [[Uwchgwyrfai]] ei hun yr holl ffordd o darddiad yr afon yn [[Llyn y Gader]] i&#039;r môr. Mae ochr &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;dwyreiniol &lt;/del&gt;y dyffryn yn rhan o gwmwd [[Isgwyrfai]], gyda phlwyfi Llanfaglan, Llanbeblig (Treflan a Chastellmai), a [[Betws Garmon]] yn cyd-ochri â Llanwnda.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Dyffryn Gwyrfai]] yw dyffryn [[Afon Gwyrfai]]&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;, &lt;/ins&gt;sy&#039;n rhedeg o bentref [[Rhyd-ddu]] i gyfeiriad y &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;gogledd&lt;/ins&gt;-orllewin nes &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;cyrraedd &lt;/ins&gt;ei haber yn y [[Foryd Bach]], gan ffurfio ffin &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;draddodiadol &lt;/ins&gt;plwyf [[Llanwnda]]&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;, &lt;/ins&gt;ac yn wir [[Uwchgwyrfai]] ei hun&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;, &lt;/ins&gt;yr holl ffordd o darddiad yr afon yn [[Llyn y Gader]] i&#039;r môr. Mae ochr &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;ddwyreiniol &lt;/ins&gt;y dyffryn yn rhan o gwmwd [[Isgwyrfai]], gyda phlwyfi Llanfaglan, Llanbeblig (Treflan a Chastellmai), a [[Betws Garmon]] yn cyd-ochri â Llanwnda.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Rhed Afon Gwyrfai trwy lyn dyfnaf Eryri, sef [[Llyn Cwellyn]] sydd ar waelod y dyffryn hanner ffordd rhwng Betws Garmon a Rhyd-ddu. Mae Llyn Cwellyn yn &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;lyn &lt;/del&gt;naturiol ond mae wedi addasu fel cronfa &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;ddwr &lt;/del&gt;ar gyfer Caernarfon a&#039;r gymdogaeth.  &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Rhed Afon Gwyrfai trwy lyn dyfnaf Eryri, sef [[Llyn Cwellyn]]&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;, &lt;/ins&gt;sydd ar waelod y dyffryn hanner ffordd rhwng Betws Garmon a Rhyd-ddu. Mae Llyn Cwellyn yn &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;llyn &lt;/ins&gt;naturiol ond mae wedi addasu fel cronfa &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;ddŵr &lt;/ins&gt;ar gyfer Caernarfon a&#039;r gymdogaeth.  &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Prif ddiwydiant y dyffryn (ar wahân i amaethu) oedd chwarelu am lechi ar y ddwy ochr, a &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;mwynau &lt;/del&gt;megis haearn yn bennaf ar ochr Isgwyrfai y cwm.&amp;lt;ref&amp;gt;Gwynfor Pierce Jones ac Alun John Richards, &#039;&#039;Cwm Gwyrfai&#039;&#039;, (Llanrwst, 2004), &#039;&#039;passim&#039;&#039;.&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Prif ddiwydiant y dyffryn (ar wahân i amaethu) oedd chwarelu am lechi ar y ddwy ochr, a &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;chloddio am fwynau &lt;/ins&gt;megis haearn&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;, &lt;/ins&gt;yn bennaf ar ochr Isgwyrfai y cwm.&amp;lt;ref&amp;gt;Gwynfor Pierce Jones ac Alun John Richards, &#039;&#039;Cwm Gwyrfai&#039;&#039;, (Llanrwst, 2004), &#039;&#039;passim&#039;&#039;.&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Rhedai (ac erbyn hyn, rhed) &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;reilffordd &lt;/del&gt;drac cul, sef [[Rheilffyrdd Cul Gogledd Cymru]], a ail-enwyd &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;fel &lt;/del&gt;[[Rheilffordd Ucheldir Cymru]] ar hyd y dyffryn nes iddi gau ym 1937. Ailagorwyd y lein dan enw [[Rheilffordd Eryri]] fel lein i dwristiaid &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;ym &lt;/del&gt;2001.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Rhedai (ac erbyn hyn, rhed) &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;rheilffordd &lt;/ins&gt;drac cul, sef [[Rheilffyrdd Cul Gogledd Cymru]], a ail-enwyd &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;yn &lt;/ins&gt;[[Rheilffordd Ucheldir Cymru]]&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;, &lt;/ins&gt;ar hyd y dyffryn nes iddi gau ym 1937. Ailagorwyd y lein dan enw [[Rheilffordd Eryri]] fel lein i dwristiaid &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;yn &lt;/ins&gt;2001.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{eginyn}}&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{eginyn}}&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Cyfaill Eben</name></author>
	</entry>
	<entry>
		<id>https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Dyffryn_Gwyrfai&amp;diff=4813&amp;oldid=prev</id>
		<title>Robingoch am 17:58, 17 Tachwedd 2018</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Dyffryn_Gwyrfai&amp;diff=4813&amp;oldid=prev"/>
		<updated>2018-11-17T17:58:37Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;cy&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Fersiwn hŷn&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Fersiwn yn ôl 18:58, 17 Tachwedd 2018&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Llinell 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Llinell 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Dyffryn Gwyrfai]] yw dyffryn [[Afon Gwyrfai]] sy&#039;n rhedeg o bentref [[Rhyd-ddu]] i gyfeiriad y Gogledd-orllewin nes gyrraedd ei haber yn y [[Foryd Bach]], gan ffurfio ffin traddodiadol plwyf [[Llanwnda]] ac yn wir [[Uwchgwyrfai]] ei hun yr holl ffordd o darddiad yr afon yn [[Llyn &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Dinas&lt;/del&gt;]] i&#039;r môr. Mae ochr dwyreiniol y dyffryn yn rhan o gwmwd [[Isgwyrfai]], gyda phlwyfi Llanfaglan, Llanbeblig (Treflan a Chastellmai), a [[Betws Garmon]] yn cyd-ochri â Llanwnda.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Dyffryn Gwyrfai]] yw dyffryn [[Afon Gwyrfai]] sy&#039;n rhedeg o bentref [[Rhyd-ddu]] i gyfeiriad y Gogledd-orllewin nes gyrraedd ei haber yn y [[Foryd Bach]], gan ffurfio ffin traddodiadol plwyf [[Llanwnda]] ac yn wir [[Uwchgwyrfai]] ei hun yr holl ffordd o darddiad yr afon yn [[Llyn &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;y Gader&lt;/ins&gt;]] i&#039;r môr. Mae ochr dwyreiniol y dyffryn yn rhan o gwmwd [[Isgwyrfai]], gyda phlwyfi Llanfaglan, Llanbeblig (Treflan a Chastellmai), a [[Betws Garmon]] yn cyd-ochri â Llanwnda.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Rhed Afon Gwyrfai trwy lyn dyfnaf Eryri, sef [[Llyn Cwellyn]] sydd ar waelod y dyffryn hanner ffordd rhwng Betws Garmon a Rhyd-ddu. Mae Llyn Cwellyn yn lyn naturiol ond mae wedi addasu fel cronfa ddwr ar gyfer Caernarfon a&amp;#039;r gymdogaeth.  &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Rhed Afon Gwyrfai trwy lyn dyfnaf Eryri, sef [[Llyn Cwellyn]] sydd ar waelod y dyffryn hanner ffordd rhwng Betws Garmon a Rhyd-ddu. Mae Llyn Cwellyn yn lyn naturiol ond mae wedi addasu fel cronfa ddwr ar gyfer Caernarfon a&amp;#039;r gymdogaeth.  &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Robingoch</name></author>
	</entry>
	<entry>
		<id>https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Dyffryn_Gwyrfai&amp;diff=4812&amp;oldid=prev</id>
		<title>Robingoch am 17:55, 17 Tachwedd 2018</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Dyffryn_Gwyrfai&amp;diff=4812&amp;oldid=prev"/>
		<updated>2018-11-17T17:55:53Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;cy&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Fersiwn hŷn&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Fersiwn yn ôl 18:55, 17 Tachwedd 2018&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Llinell 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Llinell 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Dyffryn Gwyrfai]] yw dyffryn [[Afon Gwyrfai]] sy&#039;n rhedeg o bentref [[Rhyd-ddu]] i gyfeiriad y Gogledd-orllewin nes gyrraedd ei haber yn y [[Foryd Bach]], gan ffurfio ffin traddodiadol plwyf [[Llanwnda]] ac yn wir [[Uwchgwyrfai]] ei hun yr holl ffordd o darddiad yr afon yn [[Llyn Dinas]] i&#039;r môr. Mae ochr dwyreiniol y dyffryn yn rhan o gwmwd [[&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Is Gwyrfai&lt;/del&gt;]], gyda phlwyfi Llanfaglan, Llanbeblig (Treflan a Chastellmai), a [[Betws Garmon]] yn cyd-ochri â Llanwnda.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Dyffryn Gwyrfai]] yw dyffryn [[Afon Gwyrfai]] sy&#039;n rhedeg o bentref [[Rhyd-ddu]] i gyfeiriad y Gogledd-orllewin nes gyrraedd ei haber yn y [[Foryd Bach]], gan ffurfio ffin traddodiadol plwyf [[Llanwnda]] ac yn wir [[Uwchgwyrfai]] ei hun yr holl ffordd o darddiad yr afon yn [[Llyn Dinas]] i&#039;r môr. Mae ochr dwyreiniol y dyffryn yn rhan o gwmwd [[&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Isgwyrfai&lt;/ins&gt;]], gyda phlwyfi Llanfaglan, Llanbeblig (Treflan a Chastellmai), a [[Betws Garmon]] yn cyd-ochri â Llanwnda.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Rhed Afon Gwyrfai trwy lyn dyfnaf Eryri, sef [[Llyn Cwellyn]] sydd ar waelod y dyffryn hanner ffordd rhwng Betws Garmon a Rhyd-ddu. Mae Llyn Cwellyn yn lyn naturiol ond mae wedi addasu fel cronfa ddwr ar gyfer Caernarfon a&amp;#039;r gymdogaeth.  &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Rhed Afon Gwyrfai trwy lyn dyfnaf Eryri, sef [[Llyn Cwellyn]] sydd ar waelod y dyffryn hanner ffordd rhwng Betws Garmon a Rhyd-ddu. Mae Llyn Cwellyn yn lyn naturiol ond mae wedi addasu fel cronfa ddwr ar gyfer Caernarfon a&amp;#039;r gymdogaeth.  &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Prif ddiwydiant y dyffryn (ar wahân i amaethu) oedd chwarelu am lechi ar y ddwy ochr, a mwynau megis haearn yn bennaf ar ochr &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Is Gwyrfai &lt;/del&gt;y cwm.&amp;lt;ref&amp;gt;Gwynfor Pierce Jones ac Alun John Richards, &#039;&#039;Cwm Gwyrfai&#039;&#039;, (Llanrwst, 2004), &#039;&#039;passim&#039;&#039;.&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Prif ddiwydiant y dyffryn (ar wahân i amaethu) oedd chwarelu am lechi ar y ddwy ochr, a mwynau megis haearn yn bennaf ar ochr &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Isgwyrfai &lt;/ins&gt;y cwm.&amp;lt;ref&amp;gt;Gwynfor Pierce Jones ac Alun John Richards, &#039;&#039;Cwm Gwyrfai&#039;&#039;, (Llanrwst, 2004), &#039;&#039;passim&#039;&#039;.&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Rhedai (ac erbyn hyn, rhed) reilffordd drac cul, sef [[Rheilffyrdd Cul Gogledd Cymru]], a ail-enwyd fel [[Rheilffordd Ucheldir Cymru]] nes iddi gau ym 1937. Ailagorwyd y lein dan enw [[Rheilffordd Eryri]] fel lein i dwristiaid ym 2001.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Rhedai (ac erbyn hyn, rhed) reilffordd drac cul, sef [[Rheilffyrdd Cul Gogledd Cymru]], a ail-enwyd fel [[Rheilffordd Ucheldir Cymru]] &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;ar hyd y dyffryn &lt;/ins&gt;nes iddi gau ym 1937. Ailagorwyd y lein dan enw [[Rheilffordd Eryri]] fel lein i dwristiaid ym 2001.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{eginyn}}&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{eginyn}}&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Robingoch</name></author>
	</entry>
	<entry>
		<id>https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Dyffryn_Gwyrfai&amp;diff=4811&amp;oldid=prev</id>
		<title>Robingoch am 17:54, 17 Tachwedd 2018</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Dyffryn_Gwyrfai&amp;diff=4811&amp;oldid=prev"/>
		<updated>2018-11-17T17:54:17Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;cy&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Fersiwn hŷn&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Fersiwn yn ôl 18:54, 17 Tachwedd 2018&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Llinell 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Llinell 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Dyffryn Gwyrfai]] yw dyffryn [[Afon Gwyrfai]] sy&amp;#039;n rhedeg o bentref [[Rhyd-ddu]] i gyfeiriad y Gogledd-orllewin nes gyrraedd ei haber yn y [[Foryd Bach]], gan ffurfio ffin traddodiadol plwyf [[Llanwnda]] ac yn wir [[Uwchgwyrfai]] ei hun yr holl ffordd o darddiad yr afon yn [[Llyn Dinas]] i&amp;#039;r môr. Mae ochr dwyreiniol y dyffryn yn rhan o gwmwd [[Is Gwyrfai]], gyda phlwyfi Llanfaglan, Llanbeblig (Treflan a Chastellmai), a [[Betws Garmon]] yn cyd-ochri â Llanwnda.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Dyffryn Gwyrfai]] yw dyffryn [[Afon Gwyrfai]] sy&amp;#039;n rhedeg o bentref [[Rhyd-ddu]] i gyfeiriad y Gogledd-orllewin nes gyrraedd ei haber yn y [[Foryd Bach]], gan ffurfio ffin traddodiadol plwyf [[Llanwnda]] ac yn wir [[Uwchgwyrfai]] ei hun yr holl ffordd o darddiad yr afon yn [[Llyn Dinas]] i&amp;#039;r môr. Mae ochr dwyreiniol y dyffryn yn rhan o gwmwd [[Is Gwyrfai]], gyda phlwyfi Llanfaglan, Llanbeblig (Treflan a Chastellmai), a [[Betws Garmon]] yn cyd-ochri â Llanwnda.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Rhed Afon Gwyrfai trwy lyn dyfnaf Eryri, sef [[Llyn Cwellyn]] sydd ar waelod y dyffryn hanner ffordd rhwng Betws Garmon a Rhyd-ddu. Mae Llyn Cwellyn yn lyn naturiol ond mae wedi addasu fel cronfa ddwr ar gyfer Caernarfon a&#039;r gymdogaeth. &lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Prif ddiwydiant y dyffryn (ar wahân i amaethu) oedd chwarelu am lechi ar y ddwy ochr, a mwynau megis haearn yn bennaf ar ochr Is Gwyrfai y cwm.&amp;lt;ref&amp;gt;Gwynfor Pierce Jones ac Alun John Richards, &amp;#039;&amp;#039;Cwm Gwyrfai&amp;#039;&amp;#039;, (Llanrwst, 2004), &amp;#039;&amp;#039;passim&amp;#039;&amp;#039;.&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Prif ddiwydiant y dyffryn (ar wahân i amaethu) oedd chwarelu am lechi ar y ddwy ochr, a mwynau megis haearn yn bennaf ar ochr Is Gwyrfai y cwm.&amp;lt;ref&amp;gt;Gwynfor Pierce Jones ac Alun John Richards, &amp;#039;&amp;#039;Cwm Gwyrfai&amp;#039;&amp;#039;, (Llanrwst, 2004), &amp;#039;&amp;#039;passim&amp;#039;&amp;#039;.&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Robingoch</name></author>
	</entry>
	<entry>
		<id>https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Dyffryn_Gwyrfai&amp;diff=4810&amp;oldid=prev</id>
		<title>Robingoch am 17:52, 17 Tachwedd 2018</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Dyffryn_Gwyrfai&amp;diff=4810&amp;oldid=prev"/>
		<updated>2018-11-17T17:52:02Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;cy&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Fersiwn hŷn&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Fersiwn yn ôl 18:52, 17 Tachwedd 2018&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l3&quot;&gt;Llinell 3:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Llinell 3:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Prif ddiwydiant y dyffryn (ar wahân i amaethu) oedd chwarelu am lechi ar y ddwy ochr, a mwynau megis haearn yn bennaf ar ochr Is Gwyrfai y cwm.&amp;lt;ref&amp;gt;Gwynfor Pierce Jones ac Alun John Richards, &amp;#039;&amp;#039;Cwm Gwyrfai&amp;#039;&amp;#039;, (Llanrwst, 2004), &amp;#039;&amp;#039;passim&amp;#039;&amp;#039;.&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Prif ddiwydiant y dyffryn (ar wahân i amaethu) oedd chwarelu am lechi ar y ddwy ochr, a mwynau megis haearn yn bennaf ar ochr Is Gwyrfai y cwm.&amp;lt;ref&amp;gt;Gwynfor Pierce Jones ac Alun John Richards, &amp;#039;&amp;#039;Cwm Gwyrfai&amp;#039;&amp;#039;, (Llanrwst, 2004), &amp;#039;&amp;#039;passim&amp;#039;&amp;#039;.&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Rhedai (ac erbyn hyn, rhed) reilffordd drac cul, sef [[Rheilffyrdd Cul Gogledd Cymru]], a ail-enwyd fel [[Rheilffordd Ucheldir Cymru]] nes iddi gau ym 1937. Ailagorwyd y lein dan enw [[&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Rheilffyrdd &lt;/del&gt;Eryri]] fel lein i dwristiaid ym 2001.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Rhedai (ac erbyn hyn, rhed) reilffordd drac cul, sef [[Rheilffyrdd Cul Gogledd Cymru]], a ail-enwyd fel [[Rheilffordd Ucheldir Cymru]] nes iddi gau ym 1937. Ailagorwyd y lein dan enw [[&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Rheilffordd &lt;/ins&gt;Eryri]] fel lein i dwristiaid ym 2001.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{eginyn}}&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;{{eginyn}}&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;</summary>
		<author><name>Robingoch</name></author>
	</entry>
	<entry>
		<id>https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Dyffryn_Gwyrfai&amp;diff=4809&amp;oldid=prev</id>
		<title>Robingoch: Crëwyd tudalen newydd yn dechrau gyda &#039;Dyffryn Gwyrfai yw dyffryn Afon Gwyrfai sy&#039;n rhedeg o bentref Rhyd-ddu i gyfeiriad y Gogledd-orllewin nes gyrraedd ei haber yn y [[Foryd Bach]...&#039;</title>
		<link rel="alternate" type="text/html" href="https://cof.canolfanuwchgwyrfai.cymru/index.php?title=Dyffryn_Gwyrfai&amp;diff=4809&amp;oldid=prev"/>
		<updated>2018-11-17T17:51:46Z</updated>

		<summary type="html">&lt;p&gt;Crëwyd tudalen newydd yn dechrau gyda &amp;#039;&lt;a href=&quot;/wici/Dyffryn_Gwyrfai&quot; title=&quot;Dyffryn Gwyrfai&quot;&gt;Dyffryn Gwyrfai&lt;/a&gt; yw dyffryn &lt;a href=&quot;/wici/Afon_Gwyrfai&quot; title=&quot;Afon Gwyrfai&quot;&gt;Afon Gwyrfai&lt;/a&gt; sy&amp;#039;n rhedeg o bentref &lt;a href=&quot;/wici/Rhyd-ddu&quot; title=&quot;Rhyd-ddu&quot;&gt;Rhyd-ddu&lt;/a&gt; i gyfeiriad y Gogledd-orllewin nes gyrraedd ei haber yn y [[Foryd Bach]...&amp;#039;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;Tudalen newydd&lt;/b&gt;&lt;/p&gt;&lt;div&gt;[[Dyffryn Gwyrfai]] yw dyffryn [[Afon Gwyrfai]] sy&amp;#039;n rhedeg o bentref [[Rhyd-ddu]] i gyfeiriad y Gogledd-orllewin nes gyrraedd ei haber yn y [[Foryd Bach]], gan ffurfio ffin traddodiadol plwyf [[Llanwnda]] ac yn wir [[Uwchgwyrfai]] ei hun yr holl ffordd o darddiad yr afon yn [[Llyn Dinas]] i&amp;#039;r môr. Mae ochr dwyreiniol y dyffryn yn rhan o gwmwd [[Is Gwyrfai]], gyda phlwyfi Llanfaglan, Llanbeblig (Treflan a Chastellmai), a [[Betws Garmon]] yn cyd-ochri â Llanwnda.&lt;br /&gt;
&lt;br /&gt;
Prif ddiwydiant y dyffryn (ar wahân i amaethu) oedd chwarelu am lechi ar y ddwy ochr, a mwynau megis haearn yn bennaf ar ochr Is Gwyrfai y cwm.&amp;lt;ref&amp;gt;Gwynfor Pierce Jones ac Alun John Richards, &amp;#039;&amp;#039;Cwm Gwyrfai&amp;#039;&amp;#039;, (Llanrwst, 2004), &amp;#039;&amp;#039;passim&amp;#039;&amp;#039;.&amp;lt;/ref&amp;gt;&lt;br /&gt;
&lt;br /&gt;
Rhedai (ac erbyn hyn, rhed) reilffordd drac cul, sef [[Rheilffyrdd Cul Gogledd Cymru]], a ail-enwyd fel [[Rheilffordd Ucheldir Cymru]] nes iddi gau ym 1937. Ailagorwyd y lein dan enw [[Rheilffyrdd Eryri]] fel lein i dwristiaid ym 2001.&lt;br /&gt;
&lt;br /&gt;
{{eginyn}}&lt;br /&gt;
&lt;br /&gt;
 ==Cyfeiriadau==&lt;br /&gt;
{{cyfeiriadau}}&lt;br /&gt;
[[Categori:Daearyddiaeth ffisegol]]&lt;br /&gt;
[[Categori:Daearyddiaeth ddynol]]&lt;br /&gt;
[[Categori:Afonydd]]&lt;/div&gt;</summary>
		<author><name>Robingoch</name></author>
	</entry>
</feed>