He is married to Maria Helena Gebben.
They got married on October 13, 1801 at Wesuwe, Haren (Ems), Landkreis Emsland, Lower Saxony, Germany, he was 31 years old.Source 3
Witness: Joh.Henr.Gebben Josephus Bippen
Child(ren):
Gerhard Hermann Nanckmann | |||||||||||||||||||||||||||||||||||
1801 | |||||||||||||||||||||||||||||||||||
Maria Helena Gebben | |||||||||||||||||||||||||||||||||||

Pauline Berens: Genealogienetwerk zus Greetje Berens voorheen EemslandBoekweitBoerenImmigratie
https://www.genealogieonline.nl/the-dutch-connection/I29617.php
Nankmann Gerardus Hermannus 18060508 Bersede
Nankmann aus Bersede Gerhardus Hermannus, Gebben aus Techlingen Anna Maria Helena