Michael Holmann, a farmer, and his family settled in the Volga German colony of Volmer on 18 July 1766. They are recorded there on the 1767 census in Household No. 8.
In 1824, Joseph Hollmann relocated from Volmer to Schuck.
The 1767 census records that Michael Holmann came from the German district of Heilbronn.
- 1834 Schuck Census (No. 68).
- 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): Vm11, Vm17.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 4 (Göttingen: Göttinger Arbeitskreis, 2008): 286.