Gertrud van Aalst, daughter of Badouin de Gand and Regenwidis.
Born before 1098 at Aalst (Alost), East Flanders, Belgium, died
Married/ Related to:
Arnould d' Ardres, son of Arnould d' Ardres and Mathilde de Marquise.
Born ± 1090 at Castle Ardres, Nord-Pas-de-Calais, France, died 1139, approximately 49 years
1. Adelide (Adelaide) d' Ardres
Born ± 1120 at Castle Ardres, Nord-Pas-de-Calais, France, died after 1148