Christoph Degraf, a physician (Arzt), and his wife Dorothea settled in the Volga German colony of Katharinenstadt on 3 July 1767. They are recorded there on the 1767 census in Household No. 121.
The 1767 census records that Christoph Degraf came from the German region of Sulzfeld.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 2 (Göttingen: Göttinger Arbeitskreis, 2001): 302.