Friedrich Bay (age 33) and his family are recorded on the 1798 census of Dreispitz in Household No. Dr41. He has not been located on the 1767 census of the Volga German colonies.
- Mai, Brent Alan. 1798 Census of the German Colonies along the Volga: Economy, Population, and Agriculture (Lincoln, NE: American Historical Society of Germans from Russia, 1999): Dr41.