Maredudd ap Cynan ab Owain Gwynedd
Maredudd ap Cynan (c. 1150 – 1212) was the grandson of Owain Gwynedd, a king of Gwynedd and ruler of most of Wales in the 12th century.
Maredudd is known to have fought alongside his brother Gruffudd against his uncle Hywel in 1170 and later fought on the side of his cousin Llywelyn ab Iorwerth between 1194–1197 in a campaign to depose another uncle Dafydd. It seems likely that Maredudd inherited his father's title in Meirionydd as a reward for his support from Llywelyn ab Iorwerth, the new ruler of Gwynedd, who would become known to posterity as Llywelyn the Great. Maredudd ap Cynan is thought to have had two sons: Llywelyn Fawr and Llywelyn Fychan.