Joachim Schäfer, a farmer, and his wife Katharina are recorded on an appendix to the 1767 census of Boisroux in Household No. 10.
They are recorded on the 1798 census of Wittmann in Household No. Wm08.
The 1767 census records that Joachim Schäfer came from the German village of Schönfeld.
- 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): Wm08.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 1 (Göttingen: Göttinger Arbeitskreis, 1999): 164.