Bartrum's "Welsh Classical Dictionary". He is mentioned in the Book of Llandaf as a son of Hywel ap Rhys in the time of bishop Cyfeiliog (BLD 236). He is again mentioned as king of Gwent in the Anglo-Saxon Chronicle (s.a. 926) where we are told that "Uwen Wenta cyning" submitted to Athelstan. He was presumably king also of Glywysing, like his father (PCB). His sons were Cadwgon, Gruffudd, and Morgan Hen.