Orphan Sophia Sack (age 14) is recorded on the 1767 census of Ober-Monjou in Household No. 61 along with the Georg Leribel family. The 1767 census does not record a relationship between the Sack and Leribel families.
The 1767 census does not record from where Sophia Sack came.
There are no known surviving male lines of this Sack family among the Volga German colonies.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 303.