Rhain, King of Dyfed & Brycheioniog
(Born c.AD 675)
(Latin: Reginus; English: Reginald)

Rhain was the son of Cadwgan ap Caten ap Cloten. He appears to have inherited Dyfed and most of Brycheiniog from his father, though part the latter Kingdom passed to Aust, probably his brother. It was during King Rhain's mid-8th century rule, that Dyfed was invaded by Seisyll, King of Ceredigion. The Ceredigians conquered Ystrad Tywi, and Rhain's dual kingdom was split in two. Both areas appear to have been known for a time as Rheinwg after their King. After his death, the two parts were left one to each of his two sons, Tewdwr and Tewdws.