Nikolaus Eberhardt and his family are recorded on the 1798 census of Beauregard in Household No. Bo22.
The death of Nikolaus Eberhardt in 1829 is recorded on the 1834 census of Beauregard in Household No. 29.
- 1834 Beauregard Census (Household No. 29).
- 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): Bo22.