List of Welsh saints
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, 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 Ireland and Brittany.
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. By some estimates, 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] and Winifred.
List of saints
| Name | Shrine or Associated Church | Saint's Day | Royal origins | Notes | - | |
| Aaron of Aleth | Cézembre | — | Mentor of [|Saint Malo] | - | ||
| Caerleon | 20 June | — | Martyred with [|Saint Julius] | - | ||
| Adwen or Adwenna | Advent | Daughter of Brychan, king of Brycheiniog | Sometimes conflated with [|Saint Dwynwen] | - | ||
| [|Aeddan Foeddog] or Aidan or Maedoc | Ferns Enniscorthy | Son of [|Saint Aneurin], son of Caw | "Aeddan Maedoc" Disciple of [|Saint David] | - | ||
| Aelhaiarn or Aelhaearn | Guilsfield Llanaelhaearn | Descendant of Vortigern, king of Britain | Brother of Saints Cynhaiarn and Llwchaiarn Disciple of [|Saint Bueno] | - | ||
| Aerdeyrn | Llanelldeyrn | Descendant of Vortigern, king of Britain | Brother of [|Saint Ederyn] | - | ||
| Aelrhiw | - | |||||
| Afan of Builth or Afan Buellt | Llanafan Fawr Llanfechan Llanafan | 17 or | Great-grandson of Cunedda Wledig, king of Gwynedd | Bishop and martyr Cousin of Saint David | - | |
| Amphibalus | St Albans | Priest; converted Saint Alban Born in Isca | - | |||
| Ane | Child of Caw, king of Strathclyde | - | ||||
| Saint Armel or Arthfael or Armagilus | Plouharnel Saint-Armel, Plouarzel,. | Son of Hoel, king of Brittany | - | |||
| Asaph | St Asaph | 5 or 11 May | Bishop | - | ||
| Bach | Eglwys Fach | Hermit Probably spurious | - | |||
| Baglan | Baglan | Son of Ithel Hael, prince of Armorica | - | |||
| Baglan | Llanfaglan | Son of Dingad | - | |||
| Baruc or Barruc | or 29 November | - | ||||
| Beuno or Bono | Clynnog Fawr | 21 or | Descendant of Vortigern, king of Britain | Abbot Uncle of [|Saint Winifred] | - | |
| Bidofydd | With [|Saint Fidalis] | - | ||||
| Bieuzi | Disciple of Gildas | - | ||||
| Bleddyn or Bleiddian or Lupus | Bishop | - | ||||
| Bodfan | - | |||||
| Brannoc or Brannock | Braunton | or 26 June | - | |||
| Brioc | Founder saint of Brittany | - | ||||
| Brothen | Llanfrothen | 15 or | - | |||
| King of Brycheiniog | Venerated in his generation but of disputed status now. Husband of Prawst In Wales, considered the father of [|Dwynwen]; in Cornwall, considered the father of Adwen. | - | ||||
| Brynach or Byrnach | Abbot The translation of his relics was sometimes celebrated separately on 26 June. | |||||
| Buan | - | |||||
| Bugi or Beugi or Bywgi or Hywgi | Son of Gwynllyw, king of Gwynllwg | Father of Beuno and brother of Cadoc | - | |||
| Cadfan | Llangadfan | Grandson of Budic II of Brittany | Founding abbot of Tywyn and Bardsey abbeys | - | ||
| Cadfarch | - | |||||
| Cadoc or Catwg | Caerleon | Abbot of Llancarfan | - | |||
| Cadwaladr Fendigaid or Cadwalader | Llangadwaladr Llangadwaladr | Son of Cadwallon, king of Gwynedd | "Cadwalader the Blessed" King of Gwynedd | - | ||
| Caffo | Llangaffo | Child of King Caw of Strathclyde | - | |||
| Caian | Tregaian | - | ||||
| Saint Cain or Keyne or Ceinwen | Cerrigceinwen Llangeinwen | Child of King Caw of Strathclyde | Chiefly worked in Cornwall | - | ||
| Callwen | Virgin | - | ||||
| Cammarch | - | |||||
| Caradog or Caradoc | Lawrenny | Noble of Brecknockshire | Hermit | - | ||
| Carannog or Carantoc | Llangrannog Crantock | 15, 16,, or 15 Jan | Great-grandson of Ceredig, king of Ceredigion | - | ||
| Caron | Tregaron | Possibly the same as Carausius. However, Baring-Gould associates him with Ciaran | Bishop or King | - | ||
| Cathan or Cathen | St Cathan's Chapel Colonsay & Luing Gigha | - | ||||
| Cedol | - | |||||
| Ceidio | Child of King Caw of Strathclyde | - | ||||
| Ceitho | - | |||||
| Celynin | Llangelynnin | Son of Prince Helig | - | |||
| Ceneu | Clydau | Son of Corun | Bishop of St David's | - | ||
| Cenydd or Cennydd or Kenneth | Llangennith Languidic | Son of "King Dihoc" | - | |||
| Cennych | Llangennych | - | ||||
| Cewydd | Aberedw Lancaut Laleston | 1, 2 or | Child of King Caw of Strathclyde | - | ||
| Cian | Llangian | - | ||||
| Cieran or Ciarán of Saigir or Kieran | Saighir | Son of Lugna, a noble of the Osraige | An apostle of Ireland Bishop of Saighir | - | ||
| Ciwa or Cigwa or Kywa or Kew | St Kew | 6 or | Virgin; sister of St Docco | - | ||
| Clydai | Virgin | - | ||||
| Clydog or Clintacus | or 3 Nov | King | - | |||
| Clydwyn or Cledwyn | Son of Brychan, king of Brycheiniog | King | - | |||
| Clydyn or Clydau | - | |||||
| Collen | Llangollen Langolen | 21 or | - | |||
| Colman | - | |||||
| Corentin | First bishop of Quimper | - | ||||
| Cowdra or Cawrdaf | or 21 Feb | King | - | |||
| Creirwy | Great-granddaughter of Brychan, king of Brycheiniog | - | ||||
| Cristiolus | - | |||||
| Cubert see Gwbert | - | |||||
| Curig | 16 or | Martyr Celebrated with St Julitta | - | |||
| Cwyfen | 3 or 2 or | - | ||||
| Cwyllog | Llangwyllog | Child of Caw, king of Strathclyde | - | |||
| [|Cybi] | 5, 6 or, or 13 Aug | Abbot Descended from both Seithenyn, king of Gwyddno, & Brychan, king of Brycheiniog | - | |||
| Cyllin | Son of Caratacus | King of Siluria Father of King Coel | - | |||
| Cynbryd | 19 or | Martyr | - | |||
| Cynddilig | - | |||||
| Cyndeyrn or Kentigern or Mungo | Glasgow | or 25 Jul | Son of Owain, king of Rheged, and [|Saint Teneu] | Bishop of St Asaph, Hoddom, & Glasgow | - | |
| Cynfab | - | |||||
| Cynfarch | Llanfair Dyffryn Clwyd | - | ||||
| Cynfarwy | Llechgynfarwy | 8, 10 or | - | |||
| Cyngar or Congar | Holyhead Llangefni | 13 February | Child of Gerren Llyngesog of Dumnonia | Abbot | - | |
| Cynhafal | - | |||||
| Cynidr | Glasbury | Grandson of Brychan, king of Brycheiniog | Bishop Son of [|Saint Gwladys] and brother of [|Saint Eigon] | - | ||
| Cynllo | Llangoedmor | 17 or or 8 Aug | Grandson of King Coel | King | - | |
| Cynog | 14 or or 9 Oct | Martyr | - | |||
| Cywair | - | |||||
| Cynwyl | Cynwyl Elfed Cynwyl Gaeo | Descended from Brychan, king of Brycheiniog | - | |||
| David or Dewi Sant | St David's | Great-grandson of Seithenyn, king of Gwyddno, & of Brychan, king of Brycheiniog | Patron Saint of Wales | - | ||
| Decuman or Degyman | Watchet Williton | 27 or 27 February | Martyr | - | ||
| Deifer or Dier | - | |||||
| Deiniol or Daniel | Bangor | or 10 Dec | Bishop | - | ||
| Deiniolen | 22 or | - | ||||
| Derfel Gadarn | Llandderfel | - | ||||
| Deruvian or Duvian or Damian | Merthyr Dyfan Llandyfan | Bishop & Confessor Usually celebrated with St Fagan, with whom he supposedly evangelized Roman Britain at King Lucius's request Often conflated with St Dyfan on the authority of Williams | - | |||
| Digain | - | |||||
| Dilwar | Virgin | - | ||||
| Dingad | Llandovery | Son of Brychan, king of Brycheiniog | - | |||
| Diryng | Child of Caw, king of Strathclyde | - | ||||
| Dochelin | - | |||||
| Dochau or Dochow or Dochwy or Dogwyn or Docco | Llandough Llandough St Kew | - | ||||
| Dogfael | or 14 Jun | - | ||||
| Dogfan or Doewan | 13 or | Son of Brychan, king of Brycheiniog | Martyr | - | ||
| Dominica | - | |||||
| Dona or Dwna | Llandona | - | ||||
| Saint Dubhán | St Dubhán's Church, Hook Head | - | ||||
| Dunod or Dunawd | Abbot | - | ||||
| Dwynwen or Dweynween | or 13 Jul | Daughter of Brychan, king of Brycheiniog | Virgin | - | ||
| Dwywe | - | |||||
| Dyfan | Merthyr Dyfan Llandyfan | Highly obscure Presumably martyred Generally confused with St Deruvian | - | |||
| Dyfnan | Llanddyfnan | 22 or 26 May | Alleged son of Brychan, king of Brycheiniog | - | ||
| Dyfnog | Llanrhaeadr-yng-Nghinmeirch | - | ||||
| Dyfodwg | Llantrisant | - | ||||
| [|Dyfrig] or Dubricius | Abbot The translation of his relics was sometimes separately celebrated on 29 May. | - | ||||
| Edeyrn or Edern | Llanedeyrn | or 6 Jan | Descendant of Vortigern, king of Britain | - | ||
| Edwen | Virgin | - | ||||
| Egwad | Llangwad Llanfynydd | - | ||||
| Eigen | Llanigon | |||||
| Eigion | Bishop | - | ||||
| [|Eigon] | Llanigon | Grandson of [|Brychan Brycheiniog] | Son of Saint Gwladys, brother of [|Saint Cynidr] | - | ||
| Eigrad | Llaneugrad | Child of Caw, king of Strathclyde | - | |||
| Eigron | Llanigon | Child of Caw, king of Strathclyde | - | |||
| Eilian | Llaneilian | A Roman who emigrated to Anglesey to live as a hermit | - | |||
| [|Einion Frenin] | Llanengan | 9 or | Descendant of Cunedda, king of Gwynedd | "Einion the King": King of Llyn Brother of Saints Meirion and [|Seiriol] | - | |
| Elaeth or Eleth | Amlwch | 10 or | King of a realm in northern Britain who fled to Wales | - | ||
| Elen | Daughter of Eudaf Hen | Wife of Magnus Clemens Maximus Married into the family of Brychan | - | |||
| Elfan | - | |||||
| Elfin | Warrington | - | ||||
| Elian or Elien | Llanelian | - | ||||
| Elledeyrn | Descendant of Vortigern, king of Britain | - | ||||
| Elli | Llanelli | Abbot | - | |||
| Saint Eluned or Eiliwedd or Almedha | Slwch Tump | Daughter of Brychan, king of Brycheiniog | Martyr and virgin | - | ||
| Elvis of Eilfyw or Ailbe | St Elvis | - | ||||
| Elwad | - | |||||
| Elyw or Eliw | 14 or | - | ||||
| Endelienta or Endellion | Church of St Endelienta, St Endellion | Daughter of Brychan, king of Brycheiniog | - | |||
| Enoder | St Enoder | - | ||||
| Enodoch | - | |||||
| Erbin | or 13 Jan | King of Dumnonia | - | |||
| Erfyl or Urfyl | Llanerfyl | - | ||||
| Eugrad | Child of Caw, king of Strathclyde | - | ||||
| Eurgain | - | |||||
| Ewryd | - | |||||
| Fagan or Ffagan or Fugatius | St Fagans | or 8 Aug 26 May | Bishop & Confessor Usually celebrated with St Deruvian, with whom he supposedly evangelized Roman Britain at King Lucius's request Often connected with St Dyfan on the authority of Williams | - | ||
| Ffinian or Finian | - | |||||
| Ffraid or Bridget or Bride or Bhrid | Llansantffraed Llansantffraid Llansantffraid-ym-Mechain | Irish patron saint. Nun and abbess. | ||||
| Fidalis | With [|Saint Bidofydd] | - | ||||
| Finan of Ffinan | 17 or 18 March | Bishop | - | |||
| Flewyn or Fflewin or Fflewyn | Llanfflewin | Son of Ithel Hael | - | |||
| Foeddog or Maeddog or Maedoc | Child of Caw, king of Strathclyde | - | ||||
| Gallgo | - | |||||
| Gallo | Child of Caw, king of Strathclyde | - | ||||
| Garmon or Germanus of Auxerre | Llanarmon-yn-Iâl | 31, 13, 14 or, or or | Bishop Credited with leading an army of Britons against invading Picts | - | ||
| Gelert | Llangeler Beddgelert | - | ||||
| Gildas or Aneurin | Child of Caw, king of Strathclyde. | - | ||||
| Gistilian or Gistlian | 2 or | Bishop | - | |||
| Gofor | - | |||||
| Gollen or Colin | Llangollen | - | ||||
| Govan | St. Govan's Head | - | ||||
| Gafran | Son-in-law of Brychan, king of Brycheiniog | - | ||||
| Gredifael | Penmynydd | 13 or | Son of Ithel Hael | - | ||
| Grwst | - | |||||
| Guirec | Perros-Guirec | - | ||||
| Gurthiern | Quimperlé | Cousin of Vortigern, king of Britain | - | |||
| Gwbert | Gwbert-on-Sea | Venerated also at Cubert, Cornwall; Cubert is said to have been a monk who came from Wales and assisted Carantoc in evangelizing that district; later returned to his monastery and became abbot and died in 775 AD; feast at Cubert is on Sunday following 4 Oct. | - | |||
| Gwen or Wenna | Wife of Salomon of Cornwall Mother of [|Saint Cybi] & aunt of Saint David | - | ||||
| Gwenafwy | Daughter of Caw, king of Strathclyde | - | ||||
| Gwenfaen | 3, 4 or | Virgin | - | |||
| Gwenfyl | Virgin | - | ||||
| Gwynhoedl | - | |||||
| Gwenillian | Daughter of Brychan, king of Brycheiniog | Great-grandmother of Saints [|Deinol] and [|Cynwl] | - | |||
| Gwenlleu | Bishop | - | ||||
| Gwenllwyfo | Llanwenllwyfo | 31.12.9999 | - | |||
| Gwenog | Virgin | - | ||||
| Gwenrhiw | Virgin | - | ||||
| Gwladys | Daughter of Brychan, king of Brycheiniog | Queen of Gwynllyw Mother of saints Cynidr and Eigon | - | |||
| Gwrda | - | |||||
| Gwrddelw | Llanddewi Brefi | Child of Caw, king of Strathclyde | - | |||
| Gwrfyw | Bangor | Son of Pasgen | - | |||
| Gwrhai | Child of Caw, king of Strathclyde | - | ||||
| Gwrnerth | With [|Saint Llywelyn] | - | ||||
| Gwrthwl or Mwthwl | - | |||||
| Gwyrd | Friar | - | ||||
| Gwyddelan | - | |||||
| Gwyddfarch | - | |||||
| Gwynan or Gwynen | Commemorated with [|Saint Gwynws] Conflated with [|Saint Gwynin] | - | ||||
| Gwynin | Dwygyfylchi | - | ||||
| Gwynllyw Filwr or Gundleus | 29 or | King of Gwynllwg | Husband of Gwladys, father of Cadoc and others | - | ||
| Gwynno | Llantrisant Llanwynno | - | ||||
| Gwynog | 22, 23 or | Commemorated with [|Saint Noethon] | - | |||
| Gwynws | Commemorated with [|Saint Gwynan] | - | ||||
| Henwg | Llanbenwg | Supposed links to King Arthur and Constantine | - | |||
| Huail | Son of Caw, king of Strathclyde | - | ||||
| Hychan | - | |||||
| Hywel | Llanhywel Llanllowell | Son of Emyr Llydaw, king of Brittany | King | - | ||
| Idloes | Llanidloes | - | ||||
| Iestyn | Llaniestyn Llaniestyn | - | ||||
| Ilar or Hilary | Llanilar Trefilan | 13, 14 or | — | Martyr Possibly Bretish companion of [|Saint Cadfan] | - | |
| Ilid | Llanilid | - | ||||
| Illog | - | |||||
| Illtud or Illtyd | Llantwit Major | - | ||||
| Ina | Llanina | Granddaughter of Cunedda Wledig, king of Gwynedd | - | |||
| Isan | Llanishen | Disciple of [|Saint Illtyd] | - | |||
| [|Isfael] or Ismael | St Ishmaels | Son of Budig | Bishop Disciple of Saint David | - | ||
| Issel | Saundersfoot | Father of Saints [|Gwen Teirbron] and [|Teilo] Grandfather of [|Euddogwy], [|Tyfei], Isfael, [|Gwenthenoc], Jacut, Winwaloe | - | |||
| Issui | Martyr | - | ||||
| Ithel Hael | Prince of Armorica Father of numerous saints | - | ||||
| Jacut | Great-grandson of Brychan Brycheiniog | - | ||||
| John Roberts | Monk and priest Born Trawsfynydd, 1577 Martyred at Tyburn 1610 | - | ||||
| John Lloyd | Priest and martyr Executed Cardiff, 1679 | - | ||||
| Julitta | 16 or | Martyr Celebrated with St Curig | - | |||
| Julius | Caerleon | Martyred with [|Saint Aaron of Caerleon] | - | |||
| Justinian or Stinan | Llanstinan Saint David's | - | ||||
| Juthwara | Sherborne Abbey | Sister of Saints [|Sidwell] and Wulvela | - | |||
| Keina | Virgin | - | ||||
| Kevoca | - | |||||
| Llamined Angel | Son of Pasgen | Claimed by Venedotian tribes Brother of [|Saint Gwrfyw] | - | |||
| Llawddog or Lleuddad | Abbot | - | ||||
| Llechid | Llanllechid | Child of Ithel Hael | - | |||
| Llibio | - | |||||
| Llily | - | |||||
| Llwchaiarn or Lluwchaiarn | 12 or | - | ||||
| Llwydian | - | |||||
| Llwni | - | |||||
| Llyr | Virgin | - | ||||
| Llywelyn | or 12 Dec | With [|Saint Gwrnerth] | - | |||
| Lythan | St Lythans | - | ||||
| Mabyn or Mabena | St Mabyn | Daughter of Brychan, king of Brycheiniog | - | |||
| Machraith | - | |||||
| Madoc | - | |||||
| Madron | Madron | - | ||||
| [|Madrun] or Materiana | - | |||||
| Maël | Corwen | 13 or | Hermit Celebrated with St Sulien | - | ||
| Maelog | Llanfaelog | Child of Caw, king of Strathclyde | - | |||
| Maelrhys or Maelrys or Maelerw | Bardsey Island | - | ||||
| Maethlu | - | |||||
| Maidoc | Bishop Not to be conflated with Aeddan Foeddog of Ferns | - | ||||
| Mallonius | Rouen | - | ||||
| Saint Malo or Machudd or Machutus | Disciple of [|Saint Aaron] | - | ||||
| Mannacus | - | |||||
| Marnock | - | |||||
| Materiana or Madrun or Madryn | Minster | Daughter of [|Saint Vortimer], king of Gwent | - | |||
| Mawgan | - | |||||
| Mawnan | - | |||||
| Mechell or Mechyll | Llanfechell | 15 or | Possibly Bretish | - | ||
| Meddwid or Moddwid | - | |||||
| Medwy | Bishop | - | ||||
| Meilig | Llowes | 14 or | Child of Caw, king of Strathclyde | - | ||
| Meirion or Meirian | - | |||||
| Melaine | St Mellion Mullion | - | ||||
| Melangell or Monacella | Pennant Melangell | or 4 or 31 Jan | Virgin Abbess | - | ||
| Mellonius | - | |||||
| Melyd or Melydyn | - | |||||
| Menefrida | St Minver | Daughter of Brychan, king of Brycheiniog | - | |||
| Merin or Merryn | St Merryn Lanmerin Plomelin | Child of Seithenyn, king of Gwyddno | - | |||
| Mereweenna | Daughter of Brychan, king of Brycheiniog | - | ||||
| Mordeyrn | - | |||||
| Mylling | - | |||||
| Mylor or Melor | - | |||||
| Meugan | 25 or, 14 Feb, 24 or 15 Apr or 18 Nov | - | ||||
| Morhaiarn | - | |||||
| Mwrog | 24 or | - | ||||
| Mynver | - | |||||
| Nectan | Hartland | Eldest son of Brychan, king of Brycheiniog | - | |||
| Nidan | Llanidan | Grandchild of Pasgen | - | |||
| Noethan or Noethon | 22, 23 or | Commemorated with [|Saint Gwynog] | - | |||
| Non or Nonita | Chapel of St Non Altarnun | Great-granddaughter of Seithenyn, king of Gwyddno | Mother of Saint David | - | ||
| Noyale | - | |||||
| Oudoceus | Llandaff Llandogo | Bishop | - | |||
| Pabo Post Prydain | - | |||||
| Padarn | Llanbadarn Fawr | 16, 15 or | Founder saint of Brittany Bishop His ordination was also sometimes celebrated as a separate holiday on 23 September. | - | ||
| Padrig or Patrick | Patron saint of Ireland Bishop | - | ||||
| Patern | Companion of Saint David | - | ||||
| Paulinus | Founder saint of Brittany | - | ||||
| Peblig | Llanbeblig | 3 or | Son of Magnus Clemens Maximus | Son of [|Saint Elen Luyddog] | - | |
| Pedrog or Petroc or Petrock | Bodmin | Patron saint of Cornwall Abbot | - | |||
| Peirio | Rhosbeirio | Child of Caw, king of Strathclyde | - | |||
| Peris | Nant Peris | or 26 Jul | Child of Helig of Tyno Helig | - | ||
| Peulan | Llanbeulan | 2 or | - | |||
| Pol Aurelian | Son of Porphyrius | Student of [|Saint Iltud] Bishop | - | |||
| Philip Evans | Priest and martyr Born Monmouth, 1645 Executed Cardiff, 1679 | - | ||||
| Polin | Bishop | - | ||||
| Pyr | Caldey Island | - | ||||
| Rhediw | - | |||||
| Rhian | Bishop | - | ||||
| Rhuddlad | Virgin | - | ||||
| Rhwydrys | - | |||||
| Rhychwyn | Llanrhychwyn | Brother of Celynin | - | |||
| Sadwrn | 25 October | - | ||||
| Saeran | - | |||||
| Samson of Dol | - | |||||
| Samson of York | Son of Caw, king of Strathclyde | Bishop | - | |||
| Sannan or Sanan | 13 or or 8 Mar or 29 Apr | - | ||||
| Sawyl or Saul | - | |||||
| Sefin | Daughter of Brychan, king of Brycheiniog | Grandmother of Saints David and Cybi | - | |||
| Seiriol | Penmon Puffin Island | Descended from Cunedda, king of Gwynedd | Brother of Saints Einion Frenin and Meirion Abbot at Penmon | - | ||
| Sidwell or Sativola | Exeter, Devon | Sister of Saints Juthwara and Wulvela | - | |||
| Silin or Giles | or 1 Oct or 27 Jan | Abbot or bishop | - | |||
| Sulien | - | |||||
| Tanwg | Llandanwg | Son of Ithel Hael | - | |||
| Tathan or Tatheus | Abbot Irish missionary to Wales | - | ||||
| Tathana | Granddaughter of Meuric ap Tewdric of Trebeferad | Associated with Saint Iltud | - | |||
| Tathyw | Caerwent St Athan | - | ||||
| Teath | St Teath | Daughter of Brychan, king of Brycheiniog | - | |||
| Tecwyn or Tegwyn | Llandecwyn | Son of Ithel Hael | - | |||
| Tegai | Llandygai | Son of Ithel Hael | - | |||
| Tegfedd or Tegwedd | Virgin | - | ||||
| Tegla or Tecla | Llandegla | 1 or or 23 or 24 Sept | Virgin | - | ||
| Teilo | Llantilio Crossenny Llantilio Pertholey Llandeilo Fawr | 9 or or 26 Nov | Child of Brychan, king of Brycheiniog | Bishop | - | |
| Teneu | Glasgow | Daughter of Lleuddun, king of Gododdin | Mother of [|Saint Cyndeyrn] Great-grandmother of Saint Winifred | - | ||
| Teulyddog | Disciple of Dyfrig | - | ||||
| Teuderius | - | |||||
| Tewdrig | 1 April | King and martyr | - | |||
| Tigernach | - | |||||
| Trillo | Llandrillo in Denbighshire Llandrillo-yn-Rhos | Son of Ithel Hael | Disciple of Saint Cadfan | - | ||
| Trunio | - | |||||
| Tudno | Llandudno | Son of Seithenyn, king of Gwyddno | - | |||
| Tudglyd or Tudglud | Llandudno Penmachno | Son of Seithenyn, king of Gwyddno | - | |||
| Tudur | 14 or | - | ||||
| Tudwal | Son of Hoel and cousin of the king of Domnonee | Bishop | - | |||
| Twrog | Bodwrog Maentwrog Llandwrog | Son of Ithel Hael | - | |||
| Tybie | Daughter of Brychan, king of Brycheiniog | Virgin & martyr | - | |||
| Tydecho | Llanymawddwy | - | ||||
| Tydfil | Merthyr Tydfil | Daughter of Brychan, king of Brycheiniog | Virgin & martyr | - | ||
| Tyfaelog | - | |||||
| Tyfanog or Tauannauc | - | |||||
| Tyfriog | Abbot | - | ||||
| Tyfrydog | Llandyfrydog | - | ||||
| Tygwy | - | |||||
| Tyneio | Llanfor | Child of Seithenyn, king of Gwyddno | - | |||
| Tyrnog | Landerneau | 4 or or 26 Jun or Sept 25 | - | |||
| Tysilio or Tyssilio | Llandysilio | 8 or | Son of Brochwel Ysgithrog | Bishop | - | |
| Tyssil | Llandyssil | - | ||||
| Tyssul | Bishop | - | ||||
| Ufelwy | Yhuel | Grandson of Gildas | - | |||
| Ulo | Capelulo | - | ||||
| Umbrafel | Son of Emyr Llydaw | - | ||||
| Urw or Wrw | Virgin | - | ||||
| Ustig | Child of Caw, king of Strathclyde | Associated with Saints Dyfrig and [|Eldad] | - | |||
| Urith | - | |||||
| Usyllt | Tenby | Descendant of Cunedda, king of Gwynedd | Father of [|Saint Teilo] | - | ||
| Veep | St Veep | - | ||||
| Vortimer | Descendant of Vortigern, king of Britain | "Vortimer the Blessed" King of Gwent Father of Madrun | - | |||
| Weneppa | Gwennap | Daughter of Caw, king of Strathclyde | - | |||
| Winfrith | Bishop of Lichfield | - | ||||
| Winifred or Gwenfrewi or Gwenffrewi | Holywell | 19 or or 4 Nov 8 July | Descendant of Vortigern, king of Britain | Virgin & martyr Granddaughter of Saint Teneu and niece of [|Saint Beuno] Her decollation was frequently celebrated separately on 22 June. The translation of her relics was frequently celebrated separately on 3 November. | - | |
| Wethenoc | Great-grandson of Brychan, king of Brycheiniog | - | ||||
| Winwaloe | Great-grandson of Brychan, king of Brycheiniog | - | ||||
| Wulvela | Sister of Saints Juthwara and Sidwell | - | ||||
| Ylched or Ulched | Llechylched | or 9 May 6 April | - | |||
| Ystyffan or Stephen | Llansteffan | Descendant of Vortigern, king of Britain | Associate of Saint Teilo | - |
Other commemorations
- 29 May: The translation of [|Saint Dyfrig]
- 6 June: Y Trisaint, the Three Saints
- 22 June: The decollation of Saint Winifred
- 26 June: The translation of [|Saint Brynach]
- 1 or 2 July: Gwyl y Gwlaw
- 9 September: Gwyl y Ddelw Fyw, the Living Image
- 23 September: The ordination of [|Saint Padarn]
- 21 October: Gwyl y Gweryddon, the Eleven Thousand Virgins
- 3 November: The translation of Saint Winifred
- 11 December: Dydd Ilas Llywelyn, the day on which Llywelyn was slain