He is married to Geeske van der Woude.
They got married on May 24, 1907 at Opsterland (Fr), he was 28 years old.Source 3
grandparents
parents
brothers/sisters
children
Marten Pieters Koster | ||||||||||||||||||
1907 | ||||||||||||||||||
Geeske van der Woude | ||||||||||||||||||
Geboorteregister 1878, Tietjerksteradeel
http://www.graftombe.nl/names/info/419649/koster
Huwelijksregister 1907, Opsterland