(1) He is married to Euphemia Margaretha Bollmer.
They got married on May 30, 1911 at Twist, Landkreis Emsland, Lower Saxony, Germany, he was 26 years old.Source 3
Pauline Berens: Genealogienetwerk zus Greetje Berens voorheen EemslandBoekweitBoerenImmigratie
https://www.genealogieonline.nl/the-dutch-connection/I1909.php
Vauscoleurs, Lothringen, Frankreich