Johann Adam Räder (age 18) and his sister Maria Katharina (age 14) are recorded on the 1775 census of Beideck in Household No. 28 along with their stepfather Nikolaus Drumheller.
Adam Räder is recorded on the 1798 census of Beideck in Household No. Bd76.
- 1775 Beideck Census (Household No. 28).
- 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): Bd76.