He is married to Antje van Kammen.
They got married on August 21, 1916 at Groningen (Gr), he was 20 years old.Source 3
grandparents
parents
brothers/sisters
children
Jan Oldenburger | ||||||||||||||||||
1916 | ||||||||||||||||||
Antje van Kammen | ||||||||||||||||||
Geboorteregister 1896, Achtkarspelen
https://www.graftombe.nl/names/info/1809664/oldenburger
Huwelijksregister Groningen 1916