{"id":2699,"date":"2026-08-18T13:54:50","date_gmt":"2026-08-18T12:54:50","guid":{"rendered":"https:\/\/www.hanesmon.org.uk\/aaswp\/?page_id=2699"},"modified":"2026-08-18T14:49:50","modified_gmt":"2026-08-18T13:49:50","slug":"llyfryddiaeth-ynys-mon","status":"publish","type":"page","link":"https:\/\/www.hanesmon.org.uk\/aaswp\/cy\/llyfryddiaeth-ynys-mon\/","title":{"rendered":"Llyfryddiaeth Ynys M\u00f4n"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Lluniwyd Llyfryddiaeth o weithiau yn trafod Ynys M\u00f4n gan Mr. Dewi O Jones, F.L.A., a cafodd ei gyhoeddi gan Wasanaeth Llyfrgelloedd Gwynedd ym 1979. Mae&#8217;n fan cychwyn hanfodol wrth chwilio am wybodaeth am hanes yr Ynys. Mae&#8217;r llyfryddiaeth allan o brint ond wedi ei wneud ar gael ar-lein gan y Gymdeithas fel rhan o&#8217;n Dathliadau Canmlwyddiant. Mae&#8217;n rhestru ffynonellau eilaidd a gyhoeddwyd ar bynciau Ynys M\u00f4n a ymddangosodd mewn print cyn 31 Rhagfyr 1977. Nodir cwmpas y llyfryddiaeth a&#8217;r ffynonellau a ymgynghorwyd \u00e2 nhw yn y <a href=\"http:\/\/www.hanesmon.org.uk\/aaswp\/wp-content\/uploads\/Files\/Bib-Intro.pdf\">Cyflwyniad i&#8217;r Llyfryddiaeth<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Roedd gan y llyfryddiaeth wreiddiol drefniant cymhleth iawn. Roedd nifer o fynegeion a oedd yn cyfeirio at rifau. Cedwir y rhifau hynny yn y gronfa ddata hon fel y \u2018Bib_Ref\u2019.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Roedd prif adran y llyfryddiaeth yn cynnwys dros 5,000 o gofnodion wedi&#8217;u rhifo ac wedi eu trefnu yn 3 rhan<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.hanesmon.org.uk\/aaswp\/anglesey-bibliography-subject-section-a\/\">Adran<\/a> <a href=\"https:\/\/www.hanesmon.org.uk\/aaswp\/anglesey-bibliography-subject-section-a\/\">A: Ynys M\u00f4n<\/a> &#8211; Rhestr gyffredinol yn nhrefn y pwnc, rhifau 1 \u2013 2712<\/li>\n\n\n\n<li><a href=\"https:\/\/www.hanesmon.org.uk\/aaswp\/anglesey-bibliography-parish-section-b\/\"><\/a><a href=\"https:\/\/www.hanesmon.org.uk\/aaswp\/anglesey-bibliography-parish-section-b\/\" data-type=\"page\" data-id=\"305\">Adran B: Plwyfi<\/a> &#8211; wedi&#8217;u rhestru yn nhrefn yr wyddor yn \u00f4l plwyf ac yna yn \u00f4l pwnc, rhifau 2800 \u2013 4418<\/li>\n\n\n\n<li><a href=\"https:\/\/www.hanesmon.org.uk\/aaswp\/anglesey-bibliography-biography-section-c\/\"><\/a><a href=\"https:\/\/www.hanesmon.org.uk\/aaswp\/anglesey-bibliography-biography-section-c\/\" data-type=\"page\" data-id=\"307\">Adran C: Ffynonellau bywgraffyddol<\/a> \u2013 wedi&#8217;u rhestru yn nhrefn yr wyddor yn \u00f4l y person, rhifau 4419 \u2013 5071<br>(Mae dros 8,500 o gofnodion yn y gronfa, gan fod gan rai cofnodion gyda rhifau ar gyfer nifer o rannau)<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Roedd gan y llyfryddiaeth wreiddiol Fynegai o awduron a oedd yn cyfeirio at rif eitem a ddefnyddiwyd wedyn i edrych ar y cofnod yn y llyfryddiaeth. Nid oes angen i chi wneud hynny yn y mynegai hwn ond mae&#8217;r rhif wedi&#8217;i gadw yn y gronfa ddata ac fe&#8217;i dangosir fel ei Bib_Ref.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nid oedd gan y llyfryddiaeth wreiddiol fynegai i\u2019r disgrifiadau a oedd yn cynnwys y teitl a&#8217;r wybodaeth lyfryddol gysylltiedig. Bydd unrhyw chwiliad a wnewch yn cynnwys disgrifiad yr eitem yn awtomatig (a ddangosir fel Teitl ac ati yn y tablau).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Lluniwyd Llyfryddiaeth o weithiau yn trafod Ynys M\u00f4n gan Mr. Dewi O Jones, F.L.A., a cafodd ei gyhoeddi gan Wasanaeth Llyfrgelloedd Gwynedd ym 1979. Mae&#8217;n fan cychwyn hanfodol wrth chwilio am wybodaeth am hanes yr Ynys. Mae&#8217;r llyfryddiaeth allan o brint ond wedi ei wneud ar gael ar-lein gan y Gymdeithas fel rhan o&#8217;n Dathliadau &hellip; <\/p>\n","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-2699","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Llyfryddiaeth Ynys M\u00f4n - Anglesey Antiquarian Society - Cymdeithas Hynafiaethwyr M\u00f4n<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.hanesmon.org.uk\/aaswp\/cy\/llyfryddiaeth-ynys-mon\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Llyfryddiaeth Ynys M\u00f4n - Anglesey Antiquarian Society - Cymdeithas Hynafiaethwyr M\u00f4n\" \/>\n<meta property=\"og:description\" content=\"Lluniwyd Llyfryddiaeth o weithiau yn trafod Ynys M\u00f4n gan Mr. Dewi O Jones, F.L.A., a cafodd ei gyhoeddi gan Wasanaeth Llyfrgelloedd Gwynedd ym 1979. Mae&#8217;n fan cychwyn hanfodol wrth chwilio am wybodaeth am hanes yr Ynys. 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