Johann Haag, a farmer, his wife Katharina Herod, and son Johannes (age 4) are recorded on the 1767 census of Köhler in Household No. 20. They had settled there on 10 August 1767.
The 1767 census records that Johann Haag came from the German region of Fulda.
- 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): Kl06.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 2 (Göttingen: Göttinger Arbeitskreis, 2001): 364.