He is married to Grietje Elisabeth de Jong.
They got married on May 31, 1930 at Wymbritseradeel, Friesland, Nederland, he was 28 years old.Source 3
grandparents
parents
brothers/sisters
children
Jan de Groot | ||||||||||||||||||
1930 | ||||||||||||||||||
Grietje Elisabeth de Jong | ||||||||||||||||||
Geboorteregister 1902, Kollumerland c.a.
https://www.graftombe.nl/names/info/1781606/groot_de
Huwelijksregister 1930, Wymbritseradeel