Carolius [later recorded as Karl] Renkling (age 16) and his brother Christian (age 12), whose unnamed father had died in the colony of Preuss, are recorded on the 1767 census of Anton in Household No. 35 along with their stepfather Johannes Kunzmann.
The 1767 census records that the Renkling brothers had come from the German village of Maulbronn in the Kurpfalz region.
- Mai, Brent Alan. 1798 Census of the German Colonies along the Volga (Lincoln, NE: American Historical Society of Germans from Russia, 1999): An44, An47.
- Pleve, Igor. Einwanderung in das Wolgagebiet 1764-1767 Band 1 (Goettingen: Der Göttinger Arbeitskreis, 1999): 63.