Category:Guillaume IV de Saint-Omer

**William IV of Saint Omer**
	(1150-1192)
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Date of birth	12th century
Date of death	1191
Family	House Saint-Omer;
Father	Guillaume III, Châtelain de Saint Omer;
Mother	Mathilde;
Child	William VI of Saint Omer; William V of Saint Omer; Nicholas I of Saint Omer; Ida de Saint Omer;
Spouse	Ida of Avesnes;
Authority file
	Q22256392;
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