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

William was born after 1320.  William's father was Henry IV de Percy and his mother was Idoine de Clifford.  His paternal grandparents were Henry III de Percy and Eleanor FitzAlan de Arundel; his maternal grandparents were Robert de Clifford and Matilda de Clare. He had four brothers and four sisters, named Robert, Roger, Thomas, Henry V, Eleanor, Margaret, Isabel and Maud.  He died in 1355.

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