He is married to Trijntje Jansma.
They got married on April 28, 1927 at Kollumerland c.a., Friesland, Nederland, he was 26 years old.Source 3
grandparents
parents
brothers/sisters
children
Klaas Kooistra | ||||||||||||||||||
1927 | ||||||||||||||||||
Trijntje Jansma | ||||||||||||||||||
Geboorteregister Grootegast 1901
https://www.graftombe.nl/names/info/2024987/kooistra
Huwelijksregister 1927, Kollumerland c.a.