Johannes Koch is recorded on the 1798 census of Zürich in Household No. Zr10.
Researcher Andreas Raith believes this Johannes belongs to the family of Adam Koch who is recorded on the 1767 census in an appendix of Beauregard recruits (No. 17) because there are several other Zürich families on the list in close proximity.
The 1767 census records that this Adam Koch came from the German village of Eitaksisia?.
- 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): Zr10.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 4 (Göttingen: Göttinger Arbeitskreis, 2008): 352.