Georg Märker, a farmer, and his wife Sophia are recorded on the 1767 census of Boisroux in Household No. 79. They had settled there on 3 August 1767.
The 1767 census records that Georg Märker came from the German region of Dessau.
- 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): Bx02, Bx38.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 1 (Göttingen: Göttinger Arbeitskreis, 1999): 158.