Weis' "Ancestral Roots. . ." (176:1). Bartrum's "Welsh Genealogies". He became King of Deheubarth upon the death of his father in 986. He consolidated the kingdoms of Wales and recreated the kingdom of his grandfather, HYWEL. His reign, which lasted until his death in 999, however, was marked by numerous defeats at the hands of marauding Vikings. The Northmen apparently were even able to make a few settlements in Wales during these years. Maredudd had no surviving son. Gwynedd and Powys reverted back to IAGO ap IDWAL of the line of ANARAWD ap RHODRI.

Maredudd ap Owain, Prince of Deheubarth who succeeded his father Owain ap Hywel Dha as ruler of South Wales/Deheubarth in 986. Maredudd conquered Gwynedd and temporarily united Wales once more, but his reign was a troubled one. From their strongholds in Dublin and the Isle of Man, the Norsemen ravaged the coast of Wales. It was recorded in 987 that two thousand men of the island of Anglesey were seized and sold as slaves. In
989 Maredudd was obliged to raise a penny poll-tax to bribe the Norsemen to stay away. Died in 999.