Orphan Anna Margaretha Ritter, daughter of the deceased Philipp Ritter, is recorded on the 1767 census of Messer in Household No. 80. She had settled there on 18 June 1767.
The 1767 census records that Anna Margaretha Ritter came from the German region of Isenburg.
There are no known surviving male lines of this Ritter family among the Volga German colonies.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 150.