Friedrich Jakob Peps and his sisters are recorded on the 1798 census of Bauer in Household No. Br39.
The death of Friedrich Jakob Peps in 1831 is recorded on the 1834 census of Jost in Household No. 12.
- 1834 Jost Census (Household No. 12).
- 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): Br39.