George Franz Wittwanger was born in 1743 in Aürach, Württemburg, Germany, and died before 1798 in Frank . Research into Germany was incidental with the Leonhardt research. George Franz Wittwanger married Dorothea Leonhardt in Büdingen, Germany, on 13 May 1766. She was born 31 May 1737 in Sprendlingen, Hessen, Germany. Georg Franz Wittwanger is recorded on the 1767 census of Frank in Household #58.
- Mai, Brent Alan and Dona Reeves-Marquardt. German Migration to the Russian Volga (Lincoln, NE: American Historical Society of Germans from Russia, 2003): 85.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 1 (Göttingen: Göttinger Arbeitskreis, 2001): 428.