Kaspar Müller and is wife, Barbara, settled in the Volga German colony of Nieder-Monjou on 3 August 1767. They are recorded there on the 1767 census in Household No. 49.
The 1767 census records that they came from the German village of Gebersdorf in Hessen.
- 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): Nm28.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 196.