Maredudd ab Owain

Maredudd ab Owain (died c. 999) was a Welsh monarch, ruling in Gwynedd, Deheubarth and Powys.

A member of the House of Dinefwr, his patrimony was the kingdom of Deheubarth comprising the southern realms of Dyfed and Seisyllwg.

Following Maredudd's death around 999, the throne of Gwynedd was recovered for the line of Idwal Foel by Cynan ap Hywel.

The throne of Deheubarth went to a man named Rhain who was accepted as Maredudd's son by its people but who – after the kingdom's conquest by Llywelyn ap Seisyll – was recorded by most Welsh histories as an Irish pretender and usurper.

The kingdom was later restored to Maredudd's family, but through Hywel ab Edwin, the grandson of his brother Einion.