Hartmann Kaufmann, a farmer, and his wife Maria settled in the Volga German colony of Susannental on 3 August 1767. They are recorded there on the 1767 census in Household No. 18.
The 1767 census records that Hartmann Kaufmann came from the German village of Müllersdorf.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 4 (Göttingen: Göttinger Arbeitskreis, 2008): 263.