Thomas Gries, a farmer, his wife Rosina, and daughter Maria Elisabeth (age 14) are recorded on the 1767 census of Seelmann in Household No. 69. They had settled there on 24 August 1767.
The 1767 census records that Thomas Gries came from the German region of Erfurt.
There are no known surviving male lines of this family among the Volga German colonies.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 1 (Göttingen: Der Göttinger Arbeitskreis, 1999): 162.