This list of Welsh saints includes Christian saints with Welsh connections, either because they were of Welsh origin and ethnicity or because they travelled to Wales from their own homeland and became noted in their hagiography for their work there.

The pagan Celts of Britain had already been extensively Christianized during the Roman period: although only four victims of Diocletian's persecution are now known (Saints Alban, "Amphibalus", and Julius and Aaron), Britons met the pagan Saxon invaders largely as Christians prior to being driven back to Wales, Cornwall, and Brittany. The family of Vortigern, which continued to hold Powys in the early medieval period, produced numerous saints. Although they largely refrained from missionizing among the Germans, Welsh refugees and missionaries were responsible for the Christianization of IrelandBaring-Gould (1898), p. 41. and Brittany.Baring-Gould (1898), p. 26.

The title of "saint" was used quite broadly in the Celtic churches. Extreme cases are Irish accounts of Gerald of Mayo's presiding over 3300 "saints" and Welsh claims that Bardsey held the remains of . More often, the title was given to the founder of any ecclesiastical settlement, which would thenceforth be known as their llan. Such communities were organized on tribal models: founding saints were almost invariably lesser members of local dynasties and their successors chosen from among their kin. The golden age of such establishments was the 6th century, when the "Three Saintly Families of Wales"—those of the invading Irish Brychan and Northerners Cunedda and Caw—displaced many of the local Silurian rulers in favor of their families and clans.Baring-Gould, Sabine. The Lives of the Saints, Vol. XVI, "The Celtic Church and its Saints", pp. 30–40. Longmans, Green, & Co. (New York), 1898. By some estimates,Rowan Williams, Reviews and comments on 'The Book of Welsh Saints'. these traditions produced over 800 pre-congregational saints venerated locally in Wales, but invasions by Saxons, Irishmen, Vikings, Normans, and others destroyed many ecclesiastical records. Similarly, the distance from Rome, suspicion of Celtic Christianity, and the relative disconnect of the local sees from Rome has left only two Welsh saints in the General Roman Calendar: Saints David (Dewi) and Winifred (Gwenffrewi).

List of saints

NameShrine orAssociated ChurchSaint's Day(Gŵyl Mabsant)Royal originsNotesAaron of AlethCézembre (Brittany) (Baring-Gould (1908), Vol. I, pp. 103 ff.)—Mentor of Saint Malo Caerleon (Baring-Gould, Sabine & al. The Lives of the British Saints: The Saints of Wales and Cornwall and Such Irish Saints as Have Dedications in Britain, Vol. I, pp. 101 ff. Chas. Clark (London), 1908. Hosted at Archive.org. Accessed 18 Nov 2014.)20 June (The Church in Wales. "The Book of Common Prayer for Use in the Church in Wales: The New Calendar and the Collects". 2003. Accessed 18 Nov 2014.The Catholic Church in England and Wales. "Liturgy Office: February 2015". Catholic Bishops' Conference of England and Wales, 2014. Accessed 18 Nov 2014.)—Martyred with Saint Julius Adwenor AdwennaAdvent (Cornwall) Daughter of Brychan, king of BrycheiniogSometimes conflated with Saint Dwynwen Aeddan Foeddogor Aidanor MaedocFerns (Ireland)Enniscorthy (Ireland) (Baring-Gould (1908), Vol. I, pp. 116 ff.)Son of Saint Aneurin, son of Caw"Aeddan Maedoc"Disciple of Saint David Aelhaiarnor AelhaearnGuilsfieldLlanaelhaearn ()Descendant of Vortigern, king of BritainBrother of Saints Cynhaiarn and LlwchaiarnDisciple of Saint Beuno AerdeyrnLlanelldeyrnDescendant of Vortigern, king of BritainBrother of Saint Ederyn Aelrhiw () Afan of Builthor Afan BuelltLlanafan FawrLlanfechanLlanafan 17 or ()Great-grandson of Cunedda Wledig, king of GwyneddBishop and martyrCousin of Saint David Amphibalus St Albans () retrieved from Priest; converted Saint AlbanBorn in Isca (Caerleon) AneChild of Caw, king of StrathclydeSaint Armelor Arthfaelor ArmagilusPlouharnel (Morbihan, Brittany)Saint-Armel (Morbihan, Brittany), Plouarzel, (Finistère, Brittany). Son of Hoel, king of BrittanyAsaphSt Asaph (Baring-Gould (1908), Vol. I, p. 72.)5 MayThe Concise Oxford Dictionary of the Christian Church, 2nd edition, E. A. Livingstone, 2000, Oxford University Press, p. 40.BishopBachEglwys FachHermitProbably spuriousBaring-Gould (1908), Vol. I, p. 212. BaglanBaglanSon of Ithel Hael, prince of ArmoricaBaglan LlanfaglanSon of Dingad Barucor Barruc or 29 November ()Beunoor BonoClynnog Fawr 21 or ()Descendant of Vortigern, king of BritainAbbotUncle of Saint Winifred Bidofydd () With Saint Fidalis Bieuzi Disciple of Gildas Bleddynor Bleiddianor Lupus () Bishop Bodfan () Brannocor BrannockBraunton or 26 June Brioc Founder saint of Brittany BrothenLlanfrothen 15 or () King of BrycheiniogVenerated in his generation but of disputed status now.Husband of PrawstIn Wales, considered the father of Dwynwen; in Cornwall, considered the father of Adwen. Brynachor Byrnach () AbbotThe translation of his relics was sometimes celebrated separately on 26 June. Buan () Bugior Beugior Bywgi or Hywgi Son of Gwynllyw, king of Gwynllwg Father of Beuno and brother of CadocCadfanLlangadfan ()Grandson of Budic II of BrittanyFounding abbot of Tywyn and Bardsey abbeys Cadfarch () Cadocor CatwgCaerleon ()Abbot of Llancarfan Cadwaladr Fendigaidor CadwaladerLlangadwaladrLlangadwaladr ()Son of Cadwallon, king of Gwynedd"Cadwalader the Blessed"King of Gwynedd CaffoLlangaffoChild of King Caw of Strathclyde CaianTregaian () Saint Cainor Keyneor CeinwenCerrigceinwenLlangeinwen ()Child of King Caw of StrathclydeChiefly worked in Cornwall Callwen ()Virgin Cammarch () Caradogor CaradocLawrenny ()Noble of BrecknockshireHermit Carannogor CarantocLlangrannogCrantock (Cornwall) 15, 16, , or 15 Jan ()Great-grandson of Ceredig, king of CeredigionCaronTregaron ()Possibly the same as Carausius (Roman name). However, Baring-Gould associates him with Ciaran Bishop or KingCathanor CathenSt Cathan's ChapelColonsay & LuingGigha ()Cedol () Saint CeidioChild of King Caw of Strathclyde Ceitho () CelyninLlangelynnin ()Son of Prince HeligCeneuClydau ()Son of CorunBishop of St David's Cenyddor Cennyddor KennethLlangennithLanguidic (Brittany) Son of "King Dihoc"(presumably Deroch II of Domnonée) CennychLlangennych CewyddAberedwLancautLaleston 1, 2 or ()Child of King Caw of Strathclyde CianLlangian () Cieranor Ciarán of Saigiror KieranSaighir (Ireland) ()Son of Lugna, a noble of the Osraige An apostle of IrelandBishop of Saighir Ciwaor Cigwaor Kywaor KewSt Kew (Cornwall)Doble, G.H. Saints of Cornwall, Part 4: Newquay, Padstow, and Bodmin district, pp. 105-109. Dean & Chapter (Truro), 1965. 6 or Cornish Church Guide, p. 10. Blackford (Truro). () Virgin; sister of St Docco Clydai ()Virgin Clydogor Clintacus or 3 Nov (Baring-Gould (1908), Vol. I, p. 73.)King Clydwynor Cledwyn ()Son of Brychan, king of BrycheiniogKing Clydynor Clydau () Collen LlangollenLangolen (France)21 or ()Colman CorentinFirst bishop of Quimper Cowdraor Cawrdaf or 21 Feb ()King Creirwy Great-granddaughter of Brychan, king of Brycheiniog, granddaughter of Budic II Cristiolus () Cubert see Gwbert Curig16 or ()MartyrCelebrated with St Julitta Cwyfen 3 or 2 or () CwyllogLlangwyllogChild of Caw, king of StrathclydeCybi 5, 6 or , or 13 Aug ()AbbotDescended from both Seithenyn, king of Gwyddno, & Brychan, king of BrycheiniogCyllinSon of CaratacusKing of SiluriaFather of King Coel Cynbryd 19 or () Martyr Cynddilig () Cyndeyrnor Kentigernor MungoGlasgow or 25 Jul ()Son of Owain, king of Rheged, and Saint TeneuBishop of St Asaph, Hoddom, & Glasgow Cynfab () CynfarchLlanfair Dyffryn Clwyd () CynfarwyLlechgynfarwy 8, 10 or () Cyngaror CongarHolyheadLlangefni ()Child of Gerren Llyngesog of DumnoniaAbbot Cynhafal () CynidrGlasbury ()Grandson of Brychan, king of BrycheiniogBishopSon of Saint Gwladys and brother of Saint Eigon CynlloLlangoedmor 17 or or 8 Aug () Grandson of King Coel King Cynog 14 or or 9 Oct ()Martyr Cywair () CynwylCynwyl ElfedCynwyl Gaeo ()Descended from Brychan, king of Brycheiniog Davidor Dewi SantSt David's ()Great-grandson of Seithenyn, king of Gwyddno, & of Brychan, king of BrycheiniogPatron Saint of Wales Decumanor DegymanWatchet (England)Williton (England) 27 or ()27 FebruaryChalloner, Richard. A Memorial of Ancient British Piety: or, a British Martyrology. W. Needham, 1761. Retrieved 14 March 2013.Martyr Deiferor Dier () Deiniolor DanielBangor or 10 Dec () Bishop Deiniolen 22 or () Derfel GadarnLlandderfel () Deruvianor Duvianor DamianMerthyr Dyfan (mistakenly)Llandyfan (mistakenly) ()Bishop & ConfessorUsually celebrated with St Fagan, with whom he supposedly evangelized Roman Britain at King Lucius's requestOften (mistakenly) conflated with St Dyfan on the authority of Williams Digain () Dilwar ()Virgin Dingad Llandovery ()Son of Brychan, king of BrycheiniogDiryngChild of Caw, king of Strathclyde Dochelin () Dochauor Dochowor Dochwyor Dogwynor DoccoLlandough, CowbridgeLlandough, PenarthSt Kew (Cornwall)Doble, G. H. (1965) Saints of Cornwall, Part 4: Newquay, Padstow and Bodmin district. Truro: Dean & Chapter; pp. 105-109 () DogedLlanddogedDescendant of Cunedda according to the tale of Culhwch and OlwenMartyrDogfael or 14 Jun () Dogfanor Doewan13 or ()Son of Brychan, king of BrycheiniogMartyr Dominica Donaor DwnaLlandona ()DubhánSt Dubhán's Church, Hook Head (Ireland) Dunodor Dunawd ()Abbot Dwynwenor Dweynween or 13 Jul ()Daughter of Brychan, king of BrycheiniogVirgin DwyweDyfanMerthyr DyfanLlandyfan ()Highly obscurePresumably martyredGenerally confused with St Deruvian DyfnanLlanddyfnan 22 or ()Alleged son of Brychan, king of Brycheiniog DyfnogLlanrhaeadr-yng-Nghinmeirch () DyfodwgLlantrisant Dyfrigor Dubricius ()AbbotThe translation of his relics was sometimes separately celebrated on 29 May.Edeyrnor EdernLlanedeyrn or 6 Jan ()Descendant of Vortigern, king of Britain Edwen ()Virgin Egwad LlangwadLlanfynyddEigenLlanigon Eigion ()Bishop EigonLlanigonGrandson of Brychan BrycheiniogSon of Saint Gwladys, brother of Saint Cynidr EigradLlaneugradChild of Caw, king of StrathclydeEigronLlanigon(Cornwall)Child of Caw, king of Strathclyde EilianLlaneilian (Orth.)A Roman who emigrated to Anglesey to live as a hermit EirwEglwyswrw Female saintEinion FreninLlanengan 9 or ()Descendant of Cunedda, king of Gwynedd"Einion the King": King of Llŷn (and possibly Anglesey)Brother of Saints Meirion and Seiriol Elaethor Eleth Amlwch 10 or ()King of a realm in northern Britain who fled to Wales ElenDaughter of Eudaf HenWife of Magnus Clemens MaximusMarried into the family of Brychan Elfan () Elfin Warrington (England) Elianor ElienLlanelian () ElledeyrnDescendant of Vortigern, king of BritainElli Llanelli ()Abbot Saint Elunedor Eiliweddor AlmedhaSlwch Tump ()Daughter of Brychan, king of BrycheiniogMartyr and virgin Elvisof Eilfywor Ailbe St Elvis Elwad () Elywor Eliw 14 or () EnddwynFfynnon Enddwyn, LlanenddwynEndelientaor EndellionChurch of St Endelienta, St Endellion (Cornwall)Daughter of Brychan, king of BrycheiniogEnoderSt Enoder (Cornwall) Enodoch Erbin or 13 Jan ()King of Dumnonia Erfylor UrfylLlanerfyl ()Eugrad Child of Caw, king of Strathclyde Eurgain () Ewryd () Faganor Ffaganor FugatiusSt Fagans or 8 Aug ()26 May Bishop & ConfessorUsually celebrated with St Deruvian, with whom he supposedly evangelized Roman Britain at King Lucius's requestOften (mistakenly) connected with St Dyfan on the authority of Williams Ffinianor Finian Ffraidor Bridgetor Brideor BhridLlansantffraedLlansantffraidLlansantffraid-ym-Mechain