He is married to Akke Koster.
They got married on April 13, 1933 at Dantumadeel, Friesland, Nederland, he was 26 years old.Source 3
grandparents
parents
brothers/sisters
children
Sjoerd de Groot | ||||||||||||||||||
1933 | ||||||||||||||||||
Akke Koster | ||||||||||||||||||
Geboorteregister 1906, Wymbritseradeel
https://www.graftombe.nl/names/info/195322/groot_de
Huwelijksregister 1933, Dantumadeel