30424250. Lord Owain de la Pole & 30424251. Joan Corbet
2/1275, Gruffydd, his wife Hawise and his son Owain were all involved with Llywelyn's brother Dafydd ap Gruffydd in an attempt to assassinate Llywelyn. [The assassination was prevented by a snow storm.] The family went in exile again in England at Shrewsbury. [The details of the plot were later revealed by Gruffydd’s son Owain to the bishop of Bangor – other records indicated Owain exposed the plot to Llywelyn.] (S) History of Wales, V2, Lloyd, 1912, P748.
1277, James, abbot of Strata Marcella, present when Gruffydd settled his estates on his eldest son Owain. [This started the court case for Arwystli, between Merioneth and Builth, which the English considered part of Snowdonia.]
6/15/1281, The case of Arwystli, initiated by Adam de Montgomery [really representing King Edward and English law] against Owain ap Gruffydd ap Gwenwynwyn, ended with a decision that they should do homage to Gruffydd. (S) History and Law, Is7, 1940, P148. [Heard before William of Hopton.]
1283, “Owain ap Gruffud ap Gwenwynwyn” appeared at the parliament of Shrewsbury and surrendered his lands and crown to King Edward I; effectively becoming a Marcher Baron of England.] Owain adopting the English title “Owain de la Pole” – Owain of “Welshpool”. [This also started a family fued because inheritance became the English system where the eldest son inherited all, versus Welsh gavelkind where it was distributed, with the possibility of females to inherit.]
12/28/1291, “Owen” de la Pole granted a market and fair at Machynlleth, Wales. (S) Gazetteer of Markets and Fairs.