Orphan Simon Siebert (age 12), son of the deceased Jakob Siebert, is recorded on the 1767 census of Köhler in Household No. 18 along with the Bartolomeus Manz family. The 1767 census does not record a relationship between the Siebert and Manz families.
In 1798, Johann Adam Siebert moved from Köhler to Semenovka.
Johann Adam Siebert and his wife are recorded on the 1798 census of Semenovka in Household No. Se37.
The death of Adam Siebert in 1833 is recorded on the 1834 census of Semenovka in Household No. 73.
Simon Siebert from Köhler is recorded on the 1798 census of Franzosen in Household No. Fz09.
The 1767 census does not record from where Jakob Siebert came.
- 1834 Semenovka Census (Household No. 73).
- 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): Fz09, Se37, Mv1346.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 2 (Göttingen: Göttinger Arbeitskreis, 2001): 364.