Gruffudd Fychan I

Gruffudd Fychan was a member of the Lleision. He paid homage to Edward Longshanks for the Lordship of Yale, and fought the War of 1282–1283.

Biography Gruffudd Fychan was the youngest of the four sons of Prince Gruffudd ap Madog and great-grandson of Gruffudd Maelor, Prince of Powys Fadog with Angharad, daughter of King Owain Gwynedd. On his father's death in 1269 (or 1270) his share of inheritance was the Lordship of Iâl and Edeirnion, which included Glyn Dyfrdwy.

He was aligned to Llywelyn ap Gruffudd, Prince of Wales, against the Anglo-Normans in the Conquest of Wales by Edward I in 1277. He again fought alongside Llywelyn during the War of 1282–1283, and lost his lands to the English following his defeat. Gruffudd's brother, Owain ap Madog, also lost his part of the lordship, not to Edward I, but to Queen Eleanor of Castille.

In 1283, he obtained from the king the land of Glyndyfrdwy, anglicised as Glendower, and also owned the village of Corwen and the manor of Hafod Cil y Maen Llwyd.