Gottlieb Susdorf, a Hussar - member of the light cavalry (Husar), his wife Anna Margaretha, and children (Maria, age 5; Karl Friedrich, age 3) are recorded on the 1767 census of Katharinenstadt in Household No. 36. They had settled there on 27 August 1766.
In 1790, widow Maria Dorothea Susdorf moved from Katharinenstadt to Penza.
Karl Susdorf and his wife Eleonora Mertz from Urbach are recorded on the 1798 census of Katharinenstadt in Household No. Ka132.
The 1767 census records that Gottlieb Susdorf came from the German village of Gotha in the Thüringen region.
- 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): Ka132, Mv1211.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 2 (Göttingen: Göttinger Arbeitskreis, 2001): 2284.