In 1787, widower Melchior Köhlberger moved from Neu-Kolonie to Mariental.
Melchior Köhlberger from Köhler is recorded on the 1798 of Mariental in Household No. Mt20.
- Mai, Brent Alan. 1798 Census of the German Colonies along the Volga: Economy, Population, and Agriculture (Lincoln, NE: American Historical Society of Germans from Russia, 1999): Mt20, Mv1857.