Powys to Edward I at the Parliament held in Shrewsbury in 1283 (Dafydd ap Gruffudd, his rival in Powys Fadog was tried at the same Parliament, he was deposed for fighting on the wrong side and executed for treason against Edward). In return for surrendering the principality he received it again from the king as a free Baron of England "sub nomine et tenura liberi Baronagii Angliæ, resignando Domino Regi heredibus suis et Coronæ Angliæ nomen et circulum principatus." ("Under the name and tenure of the free baronage of England, by resigning together with his heirs to the Lord the King and to the Crown of England the princely name and coronet") The date should be accepted with reserve because Owen did not succeed his father in possession until 1286: it is possible that Owen was acting on behalf of his father, who was by then an old man. From about that time the former princely family began using the Normanised surname "de la Pole" instead of Welsh patronymics. The name derives from Pool (now called Welshpool), his principal town. The Lordship of Powys After the Statute of Rhuddlan in 1284 all of the other old princely titles in Wales also ceased to exist; and henceforth, with the exception of the Kingdom of Scotland after 1344, the English Crown did not recognise the title of "prince" or "king" in any native dynasty other than their own. However, the principality continued as a marcher lordship. The ruling family of Powys survived in the children and remoter descendants of Gruffydd ap Gwenwynwyn, henceforth known as the de la Pole family, who lived in the newly built Powis Castle. In 1293 Owen de la Pole died and was succeeded by his son Griffith de la Pole. Owen had also had several brothers, whom he enfeoffed as his feudal tenants with lordships within his own lordship. However, none of them left children except William de la Pole (of Mawddwy), who had the lordship of Mawddwy, comprising that parish and most of Mallwyd. When Griffith de la Pole died without heirs in 1309, the lordship was then inherited (according to English law) by his sister Hawise "Gadarn" ("Hawise the Strong", often simply referred to as "The Lady of Powis"), rather than to the male heirs (as prescribed by Welsh law). She died in 1349 and on the death of her husband John Charleton, 1st Baron