Heinrich Rau, a farmer, his wife Katharina, and son Nikolaus (age 4) are recorded on the 1767 census of Keller in Household No. 21. They had settled there on 12 May 1767.
Following the destruction of Keller, this family relocated to the colony of Neu-Kolonie and Nikolaus's descendants are recorded there on the 1798 census in Household No. Nk04.
The 1767 census records that Heinrich Rau came from the German village of Kottenheim near Bassenheim.
- 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): Nk04.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 2 (Göttingen: Göttinger Arbeitskreis, 2001): 345.