Eleanor de Braose (c. 1228–1251) was a Cambro-Norman noblewoman and a wealthy co-heiress of her father, who was the powerful Marcher lord William de Braose, and of her mother, Eva Marshal, a co-heiress of the Earls of Pembroke.
[citation needed] She was the youngest of four daughters[1] and a co-heiress of the powerful Marcher lord William de Braose, and Eva Marshal,[2] both of whom held considerable lordships and domains in the Welsh Marches and Ireland.
[5] While Eleanor was a young girl, her father - known to the Welsh as Gwilym Ddu (Black William) - was hanged on the orders of Llewelyn the Great, Prince of Wales for alleged adultery with Llewelyn's wife, Joan, Lady of Wales.
[6] Following the execution, her mother held de Braose lands and castles in her own right.
[11] She passed on her considerable possessions in the Welsh Marches to her eldest son Humphrey.