According to Wikipedia DE Dietrich von Wassenberg was possibly married to a daughter of the nobel family of Montiago.[1] However according to Charles Cawley, Foundation for Medieval Genealogy his wife is not known.[2] They had three children:
Gerhardt Wassenberg (1060-1131), Count of Wassenberg and Gelre
Goswin Wassenberg (Heinsberg) (1060-1128), lord of Heinsberg
Heinrich von Krieckenbeck
- Abt 1080