He is married to Trijntje Kobus.
They got married on December 5, 1914 at Kollumerland c.a., Friesland, Nederland, he was 32 years old.Source 3
Met legitimatie van twee kinderen
Child(ren):
grandparents
parents
brothers/sisters
children
Tjeerd van der Kooi | |||||||||||||||||||||||||||||||||||||||
1914 | |||||||||||||||||||||||||||||||||||||||
Trijntje Kobus | |||||||||||||||||||||||||||||||||||||||
Geboorteregister 1882, Dantumadeel
https://www.graftombe.nl/names/info/179429/kooi_van_der