He is married to Hanskje Veenstra.
They got married on May 7, 1921 at Tietjerksteradeel, Friesland, Nederland, he was 26 years old.Source 3
grandparents
parents
brothers/sisters
children
Wybe Koster | ||||||||||||||||||
1921 | ||||||||||||||||||
Hanskje Veenstra | ||||||||||||||||||
Geboorteregister 1894, Tietjerksteradeel
https://www.graftombe.nl/names/info/196820/koster
Huwelijksregister 1921, Tietjerksteradeel