He is married to Phenenna Margaretha - Margaretha Veenker.
They got married on November 26, 1816 at Wesuwe, Haren (Ems), Landkreis Emsland, Lower Saxony, Germany, he was 30 years old.Source 3
Witness: Otto Veenker Ackersm.a.Lindloe, Joseph Bippen Küster zu Wesuwe
Child(ren):
Pauline Berens: Genealogienetwerk zus Greetje Berens voorheen EemslandBoekweitBoerenImmigratie
https://www.genealogieonline.nl/the-dutch-connection/I12481.php
Kottemann Hermann Henrich Ackersmann 18340318 1834 Wieresch 49 Jahre Kottemann Joan Hermann Schoppen Maria Adeleid Veenker Margaretha Ackersfrau
Kottemann aus Wieresche 30 J. Hermann Henrich, Veenker aus Wesuwe 24 Jahre Margaretha