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Male Lord William de Grandison Click to view Lord William de Grandison in the family tree

William was born in Cassington, Oxfordshire, England.  William's father was Sire Amadeus de Grandson and his mother is Banoli de la Tour.  His paternal grandparents are Pierre de Grandson I and Agnes de Neuchatel.  He was an only child.  He died on June 27th, 1335.


William's first family with Sybil Tregoz

‌William and Sybil were married in a religious ceremony in Donyatt, Somersetshire, England.  They had a son and a daughter, named Piers and Katherine.


William's second family with Blanche de Savoy

They had a daughter named Agnes.

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