Georg Friedrich Kohlmann, a farmer, his wife Katharina, and children (Maria Elisabeth, age 17; Hans Georg, age 14; Johann Nikolaus, age 11) are recorded on the 1767 census of Rohleder in Household No. 34. They had settled there on 14 July 1766.
Nikolaus Kohlmann and his family are recorded on the 1798 census of Rohleder in Household No. Rl10 along with a note that the family is in Herzog serving as a shepherd for the colonists there.
Nikolaus Kohlmann is recorded on the 1834 census of Rohleder in Household No. 62 along with a note that he relocated to the colony of Louis in 1834.
The 1767 census records that Georg Friedrich Kohlmann came from the German region of Zweibrücken.
Some translations record this surname as Kahlmann.
- 1834 Rohleder Census (Household No. 62).
- 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): Rl30.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 4 (Göttingen: Göttinger Arbeitskreis, 2008): 56.