He is married to Antje Venema.
They got married on June 19, 1885 at Dantumadeel, Friesland, Nederland, he was 23 years old.Source 4
Child(ren):
grandparents
parents
brothers/sisters
children
Sytze Koonstra | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
1885 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Antje Venema | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Geboorteregister 1862, Dantumadeel
Overlijdensregister 1960, Harlingen
https://www.graftombe.nl/names/info/645441/koonstra
Huwelijksregister 1885, Dantumadeel