Orphan Johannes Heinrich Ostermüller (age 24) is recorded on the 1775 census of Beideck in Household No. 40 along with widow Anna Margaretha Petri and her son.
The 1775 census of Beideck does not record a relationship between the Ostermüller and Petri families.
- 1775 Census of Beideck (No. 40).
- 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): Bd13.