Triffyn Farfog
Triffyn Farfog (; born c. AD 385) was a legendary king of Dyfed, son of , a Deisi invader from Ireland, of the dynasty of Eochaid Allmuir. Triffyn married Gwledyr, the heiress of the British kings of Dyfed, in the mid-5th century and inherited the kingdom.. He was the reputed father of King Aergol Lawhir. His fraternal nephew, Cormac mac Urb, was the grandfather of Brychan Brycheiniog, eponymous founder of Brycheiniog.