See also

Guillaume DE THY LE CHÂTEAU's parents: Baudouin IV DE HAINAUT (1108-1171) and Alice DE NAMUR (1110-1168)
Guillaume DE THY LE CHÂTEAU's siblings: Agnes DE HAINAUT (1140-1168), Baudouin DE HAINAUT (c. 1150-1195) and Laurence DE HAINAUT (c. 1140-1181)
Mahaut DE LALAING's parents: Lord Simon DE LALAING (1120- ) and Marie DE MONTIGNY (1120- )

Family of Guillaume DE THY LE CHÂTEAU and Mahaut DE LALAING

Husband:
Guillaume DE THY LE CHÂTEAU (1140-1231)
Wife:
Mahaut DE LALAING (1140- )
Children:
Gerard I DE WERCHIN (1165-1246)
Marriage:

Husband: Guillaume DE THY LE CHÂTEAU

Name:
Guillaume DE THY LE CHÂTEAU
Sex:
Male
Father:
Baudouin IV DE HAINAUT (1108-1171)
Mother:
Alice DE NAMUR (1110-1168)
Birth:
1140
Death:
1231 (age 90-91)

Wife: Mahaut DE LALAING

Name:
Mahaut DE LALAING
Sex:
Female
Father:
Lord Simon DE LALAING (1120- )
Mother:
Marie DE MONTIGNY (1120- )
Birth:
1140
Death:

Child 1: Gerard I DE WERCHIN

Name:
Gerard I DE WERCHIN
Sex:
Male
Spouse:
Elkine DE WERCHIN-LONGUEVILLE (1165- )
Birth:
1165
Death:
1246 (age 80-81)