Dyfodwg, or Tyfodwg, was a 6th-century Welsh saint. He is one of the three saints (with

Illtyd Saint Illtud (also spelled Illtyd, Eltut, and, in Latin, Hildutus), also known as Illtud Farchog or Illtud the Knight, is venerated as the abbot teacher of the divinity school, Bangor Illtyd, located in Llanilltud Fawr (Llantwit Major) in Gla ...

and

Gwynno Gwynno, or Gwynnog ab Gildas, is the name of a 6th-century Welsh saint Archives at the Vatican record that his festival is 26 October; that he is regarded as a confessor; and that there is said to be a sacred well, Ffynnon Wyno, associated with ...

) from whom the ancient parish of

Llantrisant Llantrisant (; " Parish of the Three Saints") is a town in the county borough of Rhondda Cynon Taf, within the historic county boundaries of Glamorgan, Wales, lying on the River Ely and the Afon Clun. The three saints of the town's name ar ...

takes its name, and possibly the patron (believed to have been Tyfodwg son of Gwilfyw) of the parish church of Llandyfodwg in Glynogwr, between Blackmill and Gilfach Goch in

Bridgend Bridgend (; cy, Pen-y-bont ar Ogwr or just , meaning "the end of the bridge on the Ogmore") is a town in Bridgend County Borough in Wales, west of Cardiff and east of Swansea. The town is named after the medieval bridge over the River Og ...

, and gave his name to the ancient parish of

Ystradyfodwg Ystradyfodwg or Ystrad Dyfodwg (Vale of Tyfodwg) was an ancient upland parish in Glamorgan, Wales. It is believed to have been named after Dyfodwg (or Tyfodwg) a 6th-century saint or chieftain. The parish included most of the area which would lat ...

. Some records state Dyfodwg was a Breton monk, while others that he was born within the Glamorgan area. Iolo Morgannwg states that Dyfodwg founded a church at

(''The vale of Tyfodwg'') and was a disciple of

Llantwit Major Llantwit Major ( cy, Llanilltud Fawr) is a town and community in Wales on the Bristol Channel coast. It is one of four towns in the Vale of Glamorgan, with the third largest population (13,366 in 2001) after Barry and Penarth, and ahead of Cowb ...

. However, there is no record of any church being dedicated to him in Ystradyfodwg itself (the parish church is dedicated to Saint John), leading some to suggest that the parish was named, not for a saint, but a local chieftain. One legend records that Tyfodwg was a chieftain promised sainthood by the monks at Penrhys. According to Rice Rees Tyfodwg was one of the associates of Cadfan (presumably

Saint Cadfan Saint Cadfan ( la, Catamanus), sometimes Anglicized as Gideon, was the 6th century founder-abbot of Tywyn (whose church is dedicated to him) and Bardsey, both in Gwynedd, Wales. He was said to have received the island of Bardsey from Saint E ...

), though the family line in the Cambrian Biography, is inconsistent with known chronology.An Essay on the Welsh Saints, or the Primitive Christians usually considered to have been the founders of churches in Wales.
Revd Rice Rees, Longman &c., 1836. His patronal feast is kept on 25 June.Parish Website for St Tyfodwg's Church
accessed 19 November 2011

References

{{Authority control Surnames of Welsh origin Medieval Welsh saints People from Glamorgan Southwestern Brythonic saints 6th-century Christian saints