Dyfed

A kingdom of southwest Wales, formed after the Roman withdrawal from Britain in 410 AD, and Irish invasions in the 5th century 
Triffyn Farfog, son of Aed Brosc of the Deisi was the first king of Dyfed. His heir was his son Aergol Lawhir, father of Vortiporius, as rulers in the 6th century A.D.