Claudius Bernhardt was born in 1723 in Narich, Choren, France. He arrived in Frank in 1767. His name is given as Nicolaus Bernhard on the 1767 census of Frank.
- 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): Fk014, Fk052, Fk110, Fk112, Fk130.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 1 (Göttingen: Göttinger Arbeitskreis, 2008): 425.