Konrad Helfrich Wiltendorf (age 9) is recorded on the 1767 census of Grimm in Household No. 62 along with his mother Anna Eva and stepfather Wilhelm Röder.
They are recorded there on the 1775 census in Household No. 137.
The 1767 census does not record from where Konrad Wiltendorf came.
- 1775 Grimm Census (Household No. 137).
- 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): Gm164.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 2 (Göttingen: Göttinger Arbeitskreis, 2001): 81.