He is married to Eelkje van der Land.
They got married on October 31, 1931 at Kollumerland c.a., Friesland, Nederland, he was 23 years old.Source 3
grandparents
parents
brothers/sisters
children
Willem Jonker | ||||||||||||||||||
1931 | ||||||||||||||||||
Eelkje van der Land | ||||||||||||||||||
Geboorteregister 1908, Kollumerland c.a.
https://www.graftombe.nl/names/info/446899/jonker
Huwelijksregister 1931, Kollumerland c.a.