See also

Willem DE SINT-OMAAR's parents: Rabel DE SAINT-OMER (1000-1082) and Ghislaine VAN GENT (1008-1059)
Willem DE SINT-OMAAR's brother: Baudouin DE SAINT-OMER (c. 1040-c. 1097)
Mathilde DE CREQUY's parents: Boudewijn III VAN CREQUY ( - ) and Margareta VAN LEUVEN (c. 1028- )

Family of Willem DE SINT-OMAAR and Mathilde DE CREQUY

Husband:
Willem DE SINT-OMAAR (c. 1030-aft1097)
Wife:
Mathilde DE CREQUY ( -c. 1050)
Children:
Mathilde DE SINT-OMAAR (c. 1050-c. 1071)
Marriage:

Husband: Willem DE SINT-OMAAR

Name:
Willem DE SINT-OMAAR
Sex:
Male
Father:
Rabel DE SAINT-OMER (1000-1082)
Mother:
Ghislaine VAN GENT (1008-1059)
Birth:
c. 1030
Death:
aft 1097 (age 66-67)

Wife: Mathilde DE CREQUY

Name:
Mathilde DE CREQUY
Sex:
Female
Father:
Boudewijn III VAN CREQUY ( - )
Mother:
Margareta VAN LEUVEN (c. 1028- )
Death:
c. 1050

Child 1: Mathilde DE SINT-OMAAR

Name:
Mathilde DE SINT-OMAAR¹
Sex:
Female
Spouse:
Lambert II VAN GENT (bef1050-c. 1085)
Birth:
c. 1050
Death:
c. 1071 (age 20-21)

Sources

1.: http://gw.geneanet.org/heinvdb2.