She is married to Douwe Osinga.
They got married on May 18, 1935 at Westdongeradeel, Friesland, Nederland, she was 21 years old.Source 3
grandparents
parents
brothers/sisters
children
Joukje Koopmans | ||||||||||||||||||
1935 | ||||||||||||||||||
Douwe Osinga | ||||||||||||||||||
Geboorteregister 1913, Westdongeradeel
https://www.graftombe.nl/names/info/2237378/koopmans
Huwelijksregister 1935, Westdongeradeel