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

William de was born about 1275 in Ormsby,North Riding,Yorkshire,England.1   William de's father was William de Percy Sr. and his mother was Ada De Baliol.  His paternal grandparents were Walter de Percy Viscount of Lamberton and Christiana LINDSAY; his maternal grandparents were John De Baliol LORD OF BARNARD CASTLE and Dervorgilla De Galloway. He had a sister named Margaret.  He was the younger of the two children. He had a half-sister named Catherine De.


William de's family

‌William de were married in a religious ceremony about 1299 in <Kildale,Ingleby Greenhow,North Riding,Yorkshire, England>.1 

1 {Larson: Genealogical Research of Kirk Larson}
Further sources/citations:
"Pedigree Resource File - CD-Rom" @ Compact Disk #25, "Genealogical Research of Kirk Larson"

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