Widow Katharina Barbara Jäkel is recorded on the 1798 census of Galka in Household No. Gk49.
There are no known surviving male lines of this Jäkel family among 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): Gk49.