David Hahn is recorded on the 1798 census of Nieder-Monjou in Household No. Nm61.
It is possible that he is recorded on the 1767 census of Nieder-Monjou in Household No. 8 as the stepson of Ludwig Rübling. The boy's surname is not recorded there.
- 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): Nm61.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 187.