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Male William IV De St Omer Click to view William IV De St Omer in the family tree

William IV De was born about 1150 in St Omer, France.  William IV De's father was William III Chatelain De St Omer and his mother was Matilda Nmn William III 1090 St Omer.  His paternal grandparents were William II Chatelain De St Omer and Melisende De Picquigny.  He was an only child.  He died in 1192 in Holy Land On Crusade.


William IV De's family with Ida De Avesnes

‌William IV De and Ida were married in a religious ceremony in 1st Husband.  They had a son named Nicholas De.

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