Jakob Hartmann, a farmer, and his wife Maria Katharina settled in the Volga German colony of Preuss on 12 May 1767 and are recorded there on the 1767 census in Household No. 30 along with a note that they relocated to the colony of Seelmann in 1768.
The 1767 census records that Jakob Hartmann came from the German village of Wengenroth in the Darmstadt region.
- 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): Sm36.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 416.