Johann[es] Kaufmann is recorded in Household No. 118 on the 1775 census of Grimm as the stepson of Heinrich Fladung.
In 1788, Johannes Kaufmann moved from Grimm to Bauer.
- 1775 Census of Grimm (No. 118).
- 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): Br65, Mv0757.