Friedrich Körbmacher, his wife Anna Katharina, and son Johannes (age ½) are recorded on the 1775 census of Beideck in Household No. 27 along with a note that their house and all other buildings had burned in 1770, but been rebuilt.
- 1775 Census of Beideck (No. 27).
- 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): Bd68.