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

Geffrey de was born about 1239 in ,Petworth,Sussex,England.1   Geffrey de's father was Sir. William de Percy Baron and his mother was Eleanor de Balliol.  His paternal grandparents were Henry I de Percy Sheriff of Northumberland and Isabel Brus; his maternal grandparents were Ingelram (Ingram) (Balliol) De Baliol and Agnes de Berkeley. He had seven brothers named Ingelram de, William de, Walter de, Henry De, Josceline de, Richard de and Alan de.  He was the third youngest of the eight children. He had five half-sisters named Anastace, Joane de, Alice de, Agnes de and Ada de.

1 "Genealogical Research of Kirk Larson"
Further sources/citations:
"FamilySearch® Ancestral File™ v4.19", "Complete baronetage: Microprint ed." @ 3:269

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