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Male William de Percy Click to view William de Percy in the family tree

William was born about 1236.  William's father was William de Percy and his mother was Ellen de Balliol.  His paternal grandparents were Henry de Percy and Isabel le Brus; his maternal grandparents were Ingleram de Baliol and Agnes de Berkeley. He had four brothers and a sister, named Ingram, Walter, Alan, Henry II and Jocelin. He has four half-sisters named Agnes, Alice, Anastacia and Joan.

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