Johann Christian Herzog, a surgeon (Feldscher), and his family settled in the Volga German colony of Schulz on 8 September 1766. They are recorded there on the 1767 census in Household No. 6.
The 1798 census records that Christian Herzog from Schulz is living in the colony of Schwed (Sw15).
The 1767 census records that Johann Christian Herzog came from the German village of Kindelbrück in the region of Sachsen (Saxony).
- 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): Sw15.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 4 (Göttingen: Göttinger Arbeitskreis, 2008): 120.