Johann Christoph Heitz, a craftsman (Handwerker), and his family settled in the Volga German colony of Mariental on 14 June 1766. They are recorded there on the 1767 census in Household No. 45.
The 1767 census records that Johann Christoph Heitz came from the German region of Hamburg.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 106.