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

William de was born in 1265 in Cassington Oxfordshire England.1   William de's father was Amadeus De Grandison and his mother was Banoli de la Tour.  His paternal grandparents were Pierre I Sire De Grandison and Agnes De Neuchatel.  He was an only child.  He died at the age of 70 on June 27th, 1335.1 


William de's first family with Sybil De Tregoz

‌William de and Sybil were married in a religious ceremony in Of, Donyatt, Somersetshire, England.1   They had two daughters named Mabilla de and Katherine.


William de's second family with Blanche De Savoy

They had a daughter named Agnes De.

1 Joanne's Tree.1 GED.GED
Further source/citation:
daveanthes.FTW

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