Show Guillaume III de Saint-Omer's parentsShow Guillaume III de Saint-Omer's parents
Mister Guillaume III de Saint-Omer (Guillaume )
Born at in ~1120. Deceased at in ~1170. Buried at .
Biography Châtelain de Saint-Omer
Show this unionShow this union Mathilde de Brienne (~1120-)
With
Guillaume IV de Saint Omer (1150-1189) Show this unionShow this union Ide d'Avesnes (~1150-01/01/1210) Show their descendants
Mathilde de Saint Omer (1146-1205) Show this unionShow this union Pierre de Bournonville (14/07/1128-24/09/1199) Show their descendants


Source 1 nobily
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