Orphan Johannes Flach (age 18) is recorded on the 1767 census of Laub in Household No. 31 along with his stepfather Johannes Engelmann. They had settled in Laub on 19 August 1767.
Christoph Flach, son of the deceased Johannes Flach, is recorded on the 1798 census of Laub in Household No. Lb51.
The 1767 census does not record from where Johannes Flach came.
- 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): Lb51.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 27.