He is married to Aaltje Okken.
They got married on March 24, 1900 at Hoogeveen , he was 25 years old.Source 1
Child(ren):
https://www.delpher.nl/nl/kranten/view?coll=ddd&query=%28sleen+okken%29&cql%5B%5D=%28date+_gte_+%2201-01-1900%22%29&cql%5B%5D=%28date+_lte_+%2201-01-2024%22%29&facets%5Btype%5D%5B%5D=familiebericht&facets%5Bspatial%5D%5B%5D=Landelijk&facets%5Bspatial%5D%5B%5D=Regionaal%7Clokaal&redirect=true&sortfield=date&identifier=MMDA03:000104499:mpeg21:a0042&resultsidentifier=MMDA03:000104499:mpeg21:a0042&rowid=3