{"id":6041,"date":"2025-05-23T04:57:48","date_gmt":"2025-05-23T04:57:48","guid":{"rendered":"https:\/\/digitalservices.uwtsd.ac.uk\/llyfrgell\/mynediad-agored-ac-ymchwil\/cyhoeddi-mynediad-agored\/trwyddedau-creative-commons\/"},"modified":"2025-06-26T08:02:47","modified_gmt":"2025-06-26T08:02:47","slug":"trwyddedau-creative-commons","status":"publish","type":"page","link":"https:\/\/digitalservices.uwtsd.ac.uk\/cy\/llyfrgell\/mynediad-agored-ac-ymchwil\/cyhoeddi-mynediad-agored\/trwyddedau-creative-commons\/","title":{"rendered":"Trwyddedau Creative Commons"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"6041\" class=\"elementor elementor-6041 elementor-3983\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1ab9670 section-s e-flex e-con-boxed e-con e-parent\" data-id=\"1ab9670\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-1792d727 elementor-widget elementor-widget-breadcrumbs\" data-id=\"1792d727\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"breadcrumbs.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<p id=\"breadcrumbs\"><span><span><a href=\"https:\/\/digitalservices.uwtsd.ac.uk\/cy\/\">Gwasanaethau Digidol<\/a><\/span><\/span><\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6eabdea elementor-cta--layout-image-above elementor-cta--mobile-layout-image-above elementor-cta--skin-classic elementor-animated-content elementor-widget elementor-widget-call-to-action\" data-id=\"6eabdea\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"call-to-action.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-cta\">\n\t\t\t\t\t<div class=\"elementor-cta__bg-wrapper\">\n\t\t\t\t<div class=\"elementor-cta__bg elementor-bg\" style=\"background-image: url(https:\/\/digitalservices.uwtsd.ac.uk\/wp-content\/uploads\/2025\/05\/Fforwm-student-in-booth.jpg);\" role=\"img\" aria-label=\"Young woman with pink hair tied back and headphones working on a laptop at a wooden table in a modern office booth with gray upholstered walls and yellow seats.\"><\/div>\n\t\t\t\t<div class=\"elementor-cta__bg-overlay\"><\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-cta__content\">\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<h1 class=\"elementor-cta__title elementor-cta__content-item elementor-content-item\">\n\t\t\t\t\t\tTrwyddedau Creative Commons\t\t\t\t\t<\/h1>\n\t\t\t\t\n\t\t\t\t\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1721ca58 e-flex e-con-boxed e-con e-parent\" data-id=\"1721ca58\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-44665d90 e-con-full e-flex e-con e-child\" data-id=\"44665d90\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5a2b4c3d elementor-widget elementor-widget-button\" data-id=\"5a2b4c3d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-button-wrapper\">\n\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/digitalservices.uwtsd.ac.uk\/cy\/llyfrgell\/mynediad-agored-ac-ymchwil\/cyhoeddi-mynediad-agored\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t<span class=\"elementor-button-icon\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-link\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M326.612 185.391c59.747 59.809 58.927 155.698.36 214.59-.11.12-.24.25-.36.37l-67.2 67.2c-59.27 59.27-155.699 59.262-214.96 0-59.27-59.26-59.27-155.7 0-214.96l37.106-37.106c9.84-9.84 26.786-3.3 27.294 10.606.648 17.722 3.826 35.527 9.69 52.721 1.986 5.822.567 12.262-3.783 16.612l-13.087 13.087c-28.026 28.026-28.905 73.66-1.155 101.96 28.024 28.579 74.086 28.749 102.325.51l67.2-67.19c28.191-28.191 28.073-73.757 0-101.83-3.701-3.694-7.429-6.564-10.341-8.569a16.037 16.037 0 0 1-6.947-12.606c-.396-10.567 3.348-21.456 11.698-29.806l21.054-21.055c5.521-5.521 14.182-6.199 20.584-1.731a152.482 152.482 0 0 1 20.522 17.197zM467.547 44.449c-59.261-59.262-155.69-59.27-214.96 0l-67.2 67.2c-.12.12-.25.25-.36.37-58.566 58.892-59.387 154.781.36 214.59a152.454 152.454 0 0 0 20.521 17.196c6.402 4.468 15.064 3.789 20.584-1.731l21.054-21.055c8.35-8.35 12.094-19.239 11.698-29.806a16.037 16.037 0 0 0-6.947-12.606c-2.912-2.005-6.64-4.875-10.341-8.569-28.073-28.073-28.191-73.639 0-101.83l67.2-67.19c28.239-28.239 74.3-28.069 102.325.51 27.75 28.3 26.872 73.934-1.155 101.96l-13.087 13.087c-4.35 4.35-5.769 10.79-3.783 16.612 5.864 17.194 9.042 34.999 9.69 52.721.509 13.906 17.454 20.446 27.294 10.606l37.106-37.106c59.271-59.259 59.271-155.699.001-214.959z\"><\/path><\/svg>\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Cyhoeddi Mynediad Agored Cartref<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4f957bcf elementor-widget elementor-widget-text-editor\" data-id=\"4f957bcf\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>Mae\u00a0<a href=\"https:\/\/creativecommons.org\/\">Creative Commons<\/a>\u00a0yn sefydliad rhyngwladol di-elw sy\u2019n galluogi rhannu a defnyddio creadigrwydd a gwybodaeth drwy offer cyfreithiol rhad ac am ddim. Mae eu trwyddedau hawlfraint yn darparu ffordd syml, safonol o roi caniat\u00e2d i\u2019r cyhoedd rannu a defnyddio gwaith creadigol &#8211; ar amodau a ddewisir gan y\u00a0cr\u00ebwr.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6558fc0e elementor-widget elementor-widget-heading\" data-id=\"6558fc0e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Pa drwydded Creative Commons dylwn i ei defnyddio?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-14143ca2 elementor-widget elementor-widget-text-editor\" data-id=\"14143ca2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-once=\"excludeFromOwl\">Mae Creative Commons yn cynnig amrywiaeth o drwyddedau cydnabyddedig rhyngwladol i ganiat\u00e1u i waith gael ei rannu a\u2019i ailddefnyddio dan amrywiaeth o amodau. \u00a0 Ceir manylion y trwyddedau yn:\u00a0<a href=\"https:\/\/creativecommons.org\/licenses\/\">Am y Trwyddedau &#8211; Creative Commons<\/a>.\u00a0Mae\u2019r trwyddedau sy\u2019n cael eu defnyddio\u2019n fwyaf aml fel a\u00a0ganlyn:<\/p><ul data-once=\"excludeFromOwl\"><li><strong>CC BY<\/strong>: Mae\u2019r drwydded hon yn gadael i bobl eraill ddosbarthu, ailgymysgu, addasu, ac adeiladu ar eich gwaith, hyd yn oed yn fasnachol, cyhyd \u00e2\u2019u bod yn rhoi cydnabyddiaeth i chi am y greadigaeth wreiddiol. \u00a0Hon yw\u2019r drwydded fwyaf cynhwysol o\u2019r trwyddedau a gynigir ac fe\u2019i hargymhellir er mwyn lledaenu a defnyddio deunyddiau trwyddedig i\u2019r\u00a0eithaf.<\/li><li><strong>CC BY-NC<\/strong>: Mae\u2019r drwydded hon yn gadael i bobl eraill ailgymysgu, addasu, ac adeiladu ar eich gwaith yn anfasnachol, ac er bod yn rhaid i\u2019w gweithiau newydd hefyd eich cydnabod a bod yn anfasnachol, nid oes rhaid iddynt drwyddedu eu gweithiau deilliannol ar yr un\u00a0telerau.<\/li><li><strong>CC BY-NC-ND<\/strong>: Y drwydded hon yw\u2019r fwyaf cyfyngol o\u2019n chwe phrif drwydded, ac mae ond yn caniat\u00e1u i bobl eraill lawrlwytho eich gweithiau a\u2019u rhannu \u00e2 phobl eraill cyhyd \u00e2\u2019u bod yn rhoi cydnabyddiaeth i chi, ond ni allant eu newid mewn unrhyw ffordd na\u2019u defnyddio\u2019n\u00a0fasnachol.<\/li><\/ul><p data-once=\"excludeFromOwl\">Fel mater o drefn, cymhwysir trwydded CC-BY i bob cyhoeddiad ymchwil a archifir i\u2019r Gadwrfa Ymchwil. \u00a0 Rhaid i ymchwil a gyllidir drwy UKRI, y Wellcome Trust a\u2019r Sefydliad Cenedlaethol dros Ymchwil Iechyd a Gofal gael ei gyhoeddi dan drwydded CC-BY oni chytunwyd ar eithriad gyda\u2019r cyllidwr. \u00a0 Gall awduron ymchwil nad oedd wedi\u2019i gyllido gymhwyso trwyddedau Creative Commons eraill fel y bo\u2019n briodol: cysylltwch \u00e2\u2019r t\u00eem Mynediad Agored am fanylion pellach yn\u00a0<a href=\"mailto:openaccess@uwtsd.ac.uk\">openaccess@uwtsd.ac.uk<\/a><\/p><p data-once=\"excludeFromOwl\">Ym mhob achos, dylai staff ymchwil ymgynghori ag INSPIRE ynghylch trafod Hawliau Eiddo Deallusol gyda chyhoeddwyr (yn cynnwys hawlfraint, trwyddedu, cyfnodau embargo) er mwyn sicrhau telerau contractiol sy\u2019n bodloni\u00a0<a href=\"https:\/\/uowtsd.sharepoint.com\/corporate-services\/Shared%20Documents\/Forms\/AllItems.aspx?id=%2Fcorporate%2Dservices%2FShared%20Documents%2FPolicies%20%26%20Strategies%2FOther%20Staff%20Related%20Policies%20%28Non%20HR%29%2F2%2E0%20Y%20Polisi%20Eiddo%20Deallusol%2Epdf&amp;parent=%2Fcorporate%2Dservices%2FShared%20Documents%2FPolicies%20%26%20Strategies%2FOther%20Staff%20Related%20Policies%20%28Non%20HR%29\">Polisi Eiddo Deallusol y Brifysgol<\/a>\u00a0ac unrhyw bolis\u00efau cyllidwyr\u00a0perthnasol.<\/p><p data-once=\"excludeFromOwl\">Rhoddir trwydded CC BY-NC-ND i draethodau ymchwil a thraethodau hir fel mater o drefn. Caiff myfyrwyr ddewis trwydded Creative Commons wahanol wrth adneuo os bydd\u00a0angen.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2e1a2ebe elementor-widget elementor-widget-heading\" data-id=\"2e1a2ebe\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Ydy trwyddedau Creative Commons yn gwneud ailddefnyddio fy ngwaith yn fasnachol neu\u2019n faleisus yn haws?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-44d0804c elementor-widget elementor-widget-text-editor\" data-id=\"44d0804c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p data-once=\"excludeFromOwl\">Pan fyddwch chi fel awdur yn defnyddio trwydded CC-BY (y cyfeirir ati weithiau fel \u201cTrwydded Briodoli CC\u201d), chi sy\u2019n cadw hawlfraint dros eich gwaith, gan ganiat\u00e1u i bobl eraill ei ddosbarthu, ei ailgymysgu ac adeiladu arno, hyd yn oed mewn lleoliad masnachol. \u00a0RHAID i unrhyw un sy\u2019n defnyddio\u2019ch gwaith sydd \u00e2 thrwydded CC-BY roi priodoliad i chi mewn unrhyw waith sy\u2019n codi yn sgil hynny. Nid yw CC-BY yn effeithio ar eich hawliau moesol i\u2019r gwaith (o ran \u201cdefnydd difr\u00efol\u201d o\u2019ch gwaith) nac ar eich hawliau \u201cdefnydd teg\u201d. Ceir esboniadau pellach o\u2019r termau hyn\u00a0isod.<\/p>\n<p><\/p>\n<p data-once=\"excludeFromOwl\">Mae defnyddio CC-BY yn ei gwneud yn eglur i\u2019ch cynulleidfa y caiff gweithiau deilliannol o\u2019r fath eu caniat\u00e1u heb iddynt orfod cysylltu \u00e2 chi a gofyn. Mae\u2019r drwydded hon yn ceisio lledaenu\u2019ch gwaith i\u2019r eithaf. \u00a0Os dewiswch drwyddedu dan CC-BY, fe\u2019ch cynghorir i ddarparu datganiad byr ynghylch cyfeirnodi, gan ddweud wrth ddefnyddwyr posibl sut yr hoffech gael eich cydnabod, er\u00a0enghraifft:<\/p>\n<p><\/p>\n<p data-once=\"excludeFromOwl\"><em>\u201cMae hon yn erthygl Mynediad Agored a ddosbarthwyd dan delerau Trwydded Priodoliad Creative Commons, sy\u2019n caniat\u00e1u defnyddio, dosbarthu, ac ailgynhyrchu heb gyfyngiadau mewn unrhyw gyfrwng, ar yr amod bod yr awdur a\u2019r ffynhonnell wreiddiol yn cael eu\u00a0cydnabod.\u201d<\/em><\/p>\n<p><\/p>\n<p data-once=\"excludeFromOwl\">Efallai yr hoffech ddarparu dolen i\u2019r crynodeb CC-BY ar-lein i helpu eich defnyddwyr i ddeall eu rhwymedigaethau:\u00a0<a href=\"https:\/\/creativecommons.org\/licenses\/by\/4.0\/\">Creative Commons \u2014 Priodoliad 4.0 Rhyngwladol \u2014 CC BY\u00a04.0<\/a><\/p>\n<p><\/p>\n<p data-once=\"excludeFromOwl\">Mae Creative Commons yn rhoi tri disgrifiad o bob trwydded ar gael: \u201ccrynodeb\u201d hawdd ei ddarllen, copi o\u2019r cod cyfreithiol llawn a thrwydded y gall peiriant ei darllen. \u00a0Gall eu\u00a0<a href=\"https:\/\/creativecommons.org\/choose\/\">Dewiswr Trwyddedau<\/a>\u00a0hwylus hefyd eich helpu i benderfynu pa drwydded yw\u2019r fwyaf priodol i\u2019ch\u00a0gwaith.<\/p>\n<p><\/p>\n<p data-once=\"excludeFromOwl\">Daw\u2019r esboniadau canlynol o ddisgrifiad y Creative Commons ar gyfer y Drwydded\u00a0CC-BY.<\/p>\n<ul data-once=\"excludeFromOwl\">\n<li>HAWLIAU MOESOL: Yn ogystal \u00e2 hawl trwyddedwyr i ofyn am ddileu eu henw o\u2019r gwaith pan gaiff ei ddefnyddio mewn gwaith deilliannol neu waith cydweithredol nad ydynt yn ei hoffi, mae cyfreithiau hawlfraint yn y rhan fwyaf o awdurdodaethau o gwmpas y byd (ac eithrio UDA ond am mewn amgylchiadau cyfyngedig iawn) yn rhoi \u201chawliau moesol\u201d i grewyr a allai wneud yn iawn i raddau os bydd gwaith deilliannol yn \u201cdriniaeth ddifr\u00efol\u201d o waith y\u00a0trwyddedwr.<\/li>\n<li>DEFNYDD TEG: Mae pob awdurdodaeth yn caniat\u00e1u rhai defnyddiau cyfyngedig o ddeunydd \u00e2 hawlfraint heb ganiat\u00e2d. Nid yw trwyddedau CC yn effeithio ar hawliau defnyddwyr dan y cyfyngiadau ac eithriadau hawlfraint hynny, megis defnydd teg a delio teg lle bo\u2019n\u00a0berthnasol.<\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-bc42427 elementor-widget elementor-widget-text-editor\" data-id=\"bc42427\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><em>Mae peth o\u2019r wybodaeth ar y dudalen hon wedi\u2019i haddasu o Brifysgol Rhydychen dan drwydded Creative Commons Priodoliad 3.0 Heb ei Addasu (CC BY 3.0).\u00a0 Cynnwys gwreiddiol yn:\u00a0<\/em><a href=\"https:\/\/openaccess.ox.ac.uk\/licences\"><em>Copyright, Creative Commons and Open Access\u00a0(ox.ac.uk)<\/em><\/a><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-71ec9c8 e-con-full e-flex e-con e-child\" data-id=\"71ec9c8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-3b0fc2c2 elementor-widget elementor-widget-image\" data-id=\"3b0fc2c2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"600\" height=\"450\" src=\"https:\/\/digitalservices.uwtsd.ac.uk\/wp-content\/uploads\/2025\/05\/Cc.logo_.circle.svg_.png\" class=\"attachment-full size-full wp-image-3560\" alt=\"Cylch gyda llythrennau duon &#039;cc&#039; yng nghanol y ddelwedd\" srcset=\"https:\/\/digitalservices.uwtsd.ac.uk\/wp-content\/uploads\/2025\/05\/Cc.logo_.circle.svg_.png 600w, https:\/\/digitalservices.uwtsd.ac.uk\/wp-content\/uploads\/2025\/05\/Cc.logo_.circle.svg_-300x225.png 300w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Trwyddedau Creative Commons Cyhoeddi Mynediad Agored Cartref Mae\u00a0Creative Commons\u00a0yn sefydliad rhyngwladol di-elw sy\u2019n galluogi rhannu a defnyddio creadigrwydd a gwybodaeth drwy offer cyfreithiol rhad ac am ddim. Mae eu trwyddedau hawlfraint yn darparu ffordd syml, safonol o roi caniat\u00e2d i\u2019r cyhoedd rannu a defnyddio gwaith creadigol &#8211; ar amodau a ddewisir gan y\u00a0cr\u00ebwr. Pa drwydded [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":6037,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"footnotes":""},"wf_page_folders":[29],"class_list":["post-6041","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.1 (Yoast SEO v27.1.1) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Trwyddedau Creative Commons | Gwasanaethau Digidol | Prifysgol Cymru Y Drindod Dewi Sant<\/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:\/\/digitalservices.uwtsd.ac.uk\/cy\/llyfrgell\/mynediad-agored-ac-ymchwil\/cyhoeddi-mynediad-agored\/trwyddedau-creative-commons\/\" \/>\n<meta property=\"og:locale\" content=\"cy_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Trwyddedau Creative Commons\" \/>\n<meta property=\"og:description\" content=\"Trwyddedau Creative Commons Cyhoeddi Mynediad Agored Cartref Mae\u00a0Creative Commons\u00a0yn sefydliad rhyngwladol di-elw sy\u2019n galluogi rhannu a defnyddio creadigrwydd a gwybodaeth drwy offer cyfreithiol rhad ac am ddim. 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