Jakob Schnell (age 17) and his sister Jseisola [?] (age 15) are recorded on the 1767 census of Katharinenstadt in Household No. 135 along with their stepfather Friedrich Fuhrmann.
The 1767 census does not record from where the Schnell children came.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 2 (Göttingen: Göttinger Arbeitskreis, 2001): 305.