Christoph Retz (age 16) is recorded on the 1767 census of Kaneau in Household No. 34 along with his stepfather Gottfried Klehmann.
The 1767 census does not record from where Christoph Retz 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): Kn20.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 2 (Göttingen: Göttinger Arbeitskreis, 2001): 251.