Owain ap Cadwgan

He is first recorded in 1106, when he killed Meurig and Griffri, the sons of Trahaearn ap Caradog, who held lands in Arwystli.

The king responded by releasing Owain's uncle, Iorwerth ap Bleddyn from captivity in 1110 and returning the rule of Powys to him.

Owain was driven out of Powys by Iorwerth and retreated to Ceredigion, from where he made raids on Dyfed, selling his captives in the Irish slave markets.

King Henry responded by stripping Cadwgan of all his lands and forcing him to live as an exile in England, while Owain again fled to Ireland.

Gerald of Windsor, husband of Nest, was fighting on the same side, and took the opportunity for vengeance, attacking Owain when he had only ninety men with him and killing him.