He is married to Anna de Baar.
They got married on November 21, 1773 at Uithuizermeeden, Gemeente Eemsmond, Groningen, Netherlands, he was 36 years old.Source 2
Marriage contract closed October 26, 1773 in Uithuizermeeden, Gemeente Eemsmond, Groningen, Netherlands.Source 3
1773 marriage contract:
Doede Zageman - vader
Trijntje Donkens - moeder
Donko Zageman - broer, gerichtsdienaar
Grietje Jacobs - aangetrouwde zuster, e.v. Donko Zageman