Johann Hartmann, a single farmer, arrived from Lübeck at the port of Oranienbaum on 8 August 1766 aboard a pink under the command of Lieutenant Moisey Davydov.
He settled in the Volga German colony of Köhler on 21 August 1767. He is recorded there on the 1767 census in Household No. 83 married to Anna Maria Burgardt.
The Oranienbaum passenger list records that Johann Hartmann came from the German region of Bamberg while the 1767 census records that he came from the German region of Geratshofen.
- 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): Kl85.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 2 (Göttingen: Göttinger Arbeitskreis, 2001): 380.
- Pleve, Igor. Lists of Colonists to Russia in 1766: Reports by Ivan Kulberg (Saratov: Saratov State Technical University, 2010): #4182.