Leopold Ehrentraudt (age 14) is recorded on the 1767 census of Nieder-Monjou in Household No. 68 along with his sister Dorothea (age 20) and her husband Adam Rosenberg. They had settled there on 3 August 1767.
Dorothea is recorded on the 1798 census of Nieder-Monjou in Household No. Nm49 while Leopold is recorded on the 1798 census of Fischer in Household No. Fs19.
Some translations erroneously record this surname as Grontraudt.
- 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): Fs19, Nm49.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 3 (Göttingen: Göttinger Arbeitskreis, 2005): 200.