He is married to Lammechiena Anja Drent.
They got married on June 11, 1936 at Groningen (Gr), he was 24 years old.Source 3
grandparents
parents
brothers/sisters
children
Jilles Koopmans | ||||||||||||||||||
1936 | ||||||||||||||||||
Lammechiena Anja Drent | ||||||||||||||||||
Geboorteregister 1911, Kollumerland c.a.
https://www.graftombe.nl/names/info/1992506/koopmans
Huwelijksregister Groningen 1936