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Male William De Grandison Grandison I Lord Click to view William De Grandison Grandison I Lord in the family tree

William De Grandison was born about 1255.  William De Grandison's father was Amadeus De Grandson Seigneur and his mother is Benoite De La De Gerenstein.  His paternal grandfather was Pierre I De Grandson Seigneur and his paternal grandmother is Agnes De Neuchatel.  He was an only child.  He died on June 27th, 1335.  He was buried in 1335.


William De Grandison's family with Sibyl Tregoz

‌William De Grandison and Sibyl were married in a religious ceremony about 1285.  They had a son and a daughter, named Piers and Mabilia.

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