Johann Ernst Gertner is recorded on the 1798 census of Walter in Household No. Wt056.
His death in 1823 is recorded on the 1834 census in Household No. 153.
With his death, there were no surviving male lines of this 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): Wt056.