He was still a child when his father, who had been driven out of his princedom by Llywelyn the Great, died in exile in 1216. He spent his youth in England, maintained by the king, and did not return to Wales until after Llywelyn's death.  At the end of the Welsh War in 1283, the principality of Powys-Wenwynwyn was abolished and the family - now Marcher Lords- adopted the surname de la Pole meaning "of Poole" referring to their family seat in Poole (modern Welshpool). For his loyalty to Edward I, the king permitted Baron de la Pole to begin building Powis Castle.  After 1283 his estate became increasingly controlled by his son Owen. -Wikipedia