Johann Gottfried Fritz (age 11½) and his siblings (Johann Jakob, age 8; Maria Katharina, age 5½; Henrietta, age 3) are recorded on the 1775 census of Grimm in Household No. 20 along with their stepfather Christian Pikus. Their deceased father is identified as Johannes Fritz on the 1798 census of Grimm in Household No. Gm057.
- 1775 Grimm Census (Household No. 20).
- 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): Gm057.