Widow Sophia Grass is recorded on the 1798 census of Merkel in Household No. Mr30 along with a note that she is living in the neighboring colony of Dietel.
There are no known surviving male lines of this Grass family among the Volga German colonies.
- Mai, Brent Alan. 1798 Census of the German Colonies along the Volga (Lincoln, NE: American Historical Society of Germans from Russia, 1999): Mr30.