He is married to Maria Gesina Ostermann.
They got married on July 27, 1897 at Meppen, Landkreis Emsland, Lower Saxony, Germany, he was 24 years old.Source 3
Bernard Frederik Hartmann | ||||||||||||||||||
1897 | ||||||||||||||||||
Maria Gesina Ostermann |
Pauline Berens: Genealogienetwerk zus Greetje Berens voorheen EemslandBoekweitBoerenImmigratie
https://www.genealogieonline.nl/the-dutch-connection/I9017.php