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Male Piers De Grandison Click to view Piers De Grandison in the family tree

Piers was born about 1278.  Piers' father was Sir William De Grandison and his mother was Sibyle De Tregoz.  His paternal grandparents were Amadeus De Grandison and Banoile De La Tour De Gerenstein; his maternal grandparents were John De Tregoz and Matilda Fitz-Warren. He had two brothers and three sisters, named John, Otho, Mabilia, Katherine and Agnes.  He was the oldest of the six children. He had a half-sister named Agnes.

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