He is married to Baukje van der Veer.
They got married on October 29, 1925 at Dantumadeel, Friesland, Nederland, he was 24 years old.Source 3
grandparents
parents
brothers/sisters
children
Johannes van der Zwaag | ||||||||||||||||||
1925 | ||||||||||||||||||
Baukje van der Veer | ||||||||||||||||||
Geboorteregister 1901, Dantumadeel
https://www.graftombe.nl/names/info/276619/zwaag_van_der
Huwelijksregister 1925, Dantumadeel