Georg Konrad Gruber (age 9) and his siblings Ägidius [not Agatha] (age 7) & Anna (age 12) settled in the Volga German colony of Bauer on 20 July 1766. They are recorded there on the 1767 census in Household No. 29 along with their stepfather, Johann Georg Wolf, and his family.
- 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): Br23, Br41.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 1 (Göttingen: Göttinger Arbeitskreis, 1999): 123.