(1) He is married to Sophie Johanna Oltmanns.
They got married on September 23, 1920 at Groningen (Gr), he was 25 years old.Source 3
The couple were divorced on June 4, 1936.
(2) He is married to Klasina Nienhuis.
They got married on June 25, 1936 at Groningen (Gr), he was 41 years old.Source 4
grandparents
parents
brothers/sisters
children
Jochum Loonstra | ||||||||||||||||||
(1) 1920 | ||||||||||||||||||
Sophie Johanna Oltmanns | ||||||||||||||||||
(2) 1936 | ||||||||||||||||||
Klasina Nienhuis | ||||||||||||||||||
Geboorteregister Eenrum 1895
https://www.graftombe.nl/names/info/2101015/loonstra
Huwelijksregister Groningen 1920
Huwelijksregister Groningen 1936