He is married to Anna Fresenburg.
They got married on April 12, 1904 at Emmen, Gemeente Emmen, Drenthe, Nederland, he was 25 years old.Source 3
Child(ren):
Harm Hendrik Koop | |||||||||||||||||||||||||||||||||||
1904 | |||||||||||||||||||||||||||||||||||
Anna Fresenburg | |||||||||||||||||||||||||||||||||||
Pauline Berens: Genealogienetwerk zus Greetje Berens voorheen EemslandBoekweitBoerenImmigratie
https://www.genealogieonline.nl/the-dutch-connection/I18659.php