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Male William De GRANDISON Click to view William De GRANDISON in the family tree

William De was born in Of, Cassington, Oxfordshire, England.  William De's father was Pierre I Sire De GRANDSON and his mother is Agnes De NEUCHATEL.  His paternal grandparents were Ebal IV Sire De GRANDSON and Beatrix De GENEVA; his maternal grandparents are Ulric III De NEUCHATEL and Yolande De URACH ARBERG. He had a brother named Amadeus De.  He died on June 27th, 1335.


William De's family with Sybil TREGOZ

‌William De and Sybil were married in a religious ceremony in Of, Donyatt, Somersetshire, England.  They had two sons and three daughters, named Piers (Peter) De, John, Agnes, Mabilia De and Katherine De.

Sources/Citations
Ancestral File (R), Ancestral File (R)


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