Great-grandson of Einion ab Owain ap Hywel Dda, and the last representative in the senior line of descent from Hywel. Having succeeded his brother, Maredudd, in 1072, he was involved in the death of Bleddyn ap Cynfyn in 1075, and in 1078 he was himself defeated at Goodwick by Trahaearn ap Caradog. Later in the year he met his end at the hands of Caradog ap Gruffydd, and was succeeded by his second cousin Rhys ap Tewdwr.
Published date: 1959
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