and Cadwgan ab Owain (died c. 949 0r 951, "murdered by the Saxons") who ruled as joint kings of Glywysing.

Morgan succeeded his father, Owain c. 930 as king in Gwent, with his brothers also starting their rule at the same time. Following his brothers' deaths, Morgan absorbed their kingdom into his and united the former kingdoms of Gwent and Glywysing