Leonhardt Schumm, a farmer, and his wife Maria are recorded on an appendix to the 1767 census of Boisroux in Household No. 17. He is recorded on the 1798 census of Luzern in Household No. Lz10.
The 1767 census records that Leonhardt Schumm came from the German region of Kassel.
There are no known surviving male lines of this family among the Volga German colonies.
- 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): Lz10.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 1 (Göttingen: Göttinger Arbeitskreis, 1999): 165.