He is married to Alie Wessels.
They got married
https://www.delpher.nl/nl/kranten/view?facets%5Bperiode%5D%5B%5D=0%7C20e_eeuw%7C&query=opdam+and+drietrommeltjessteeg&coll=ddd&sortfield=date&identifier=MMHCO02:163844073:mpeg21:a00040&resultsidentifier=MMHCO02:163844073:mpeg21:a00040&rowid=5
https://resolver.kb.nl/resolve?urn=MMHCO02:163844073:mpeg21:a00040
The data shown has no sources.