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 G ...

and Gwynno) from whom the ancient parish of Llantrisant 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 late ...

. 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

at Llantwit Major. 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 Penrhys is a village in the county borough of Rhondda Cynon Taf, Wales, situated on a hillside overlooking both valleys of Rhondda Fawr and Rhondda Fach. It is situated around 1,100 ft above sea level and is a district of Tylorstown. Until th ...

. 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 ...

), 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