Jakob Karpf, a tailor (Schneider), his wife Katharina, and son Johann (age ½) are recorded on the 1798 census of Preuss in Household No. 111. They had settled there on 16 August 1767.
The 1767 census records that Jakob Karpf came from the German village of Unterumbach in the region of Bayern (Bavaria).
- Mai, Brent Alan. 1798 Census of the German Colonies along the Volga (Lincoln, NE: American Historical Society of Germans from Russia, 1999): Ps68, Ps73.
- Pleve, Igor. Einwanderung in das Wolgagebiet 1764-1767 Band 3 (Goettingen: Der Göttinger Arbeitskreis; 2005): 433.