Background
He was the son of Theodoric of Wassenberg.
He was the son of Theodoric of Wassenberg.
He may have been married to Clementia of Aquitaine, although that proposed marriage seems to be based on a falsified document. Gerard had three children:
Jutta of Wassenberg, married Waleran II of Limburg. Yolande of Wassenberg (Yolande of Guelders), married 1) Baldwin III, Count of Hainaut and 2) Godfrey II de Ribemont Châtelain de Valenciennes
Gerard II, Count of Guelders married Ermengarde of Zutphen, daughter of Otto II, Count of Zutphen.