He is married to Henriëtte Elisabeth Habers.
They got married on July 10, 1913 at Coevorden, Drenthe, Nederland, he was 32 years old.Source 2
grandparents
parents
brothers/sisters
children
Johan Bernard Koop | ||||||||||||||||||
1913 | ||||||||||||||||||
Henriëtte Elisabeth Habers | ||||||||||||||||||

Pauline Berens: Genealogienetwerk zus Greetje Berens voorheen EemslandBoekweitBoerenImmigratie
https://www.genealogieonline.nl/the-dutch-connection/I9949.php