Michael Ritzler, 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. 65.
The 1767 census records that Michael Ritzler came from the German district of Würzburg.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 111.