Karl Volmer and his wife Eva Maria are recorded on the 1775 census of Grimm in Household No. 128.
Eva Maria Volmer, widow of Karl Volmer, and her children are recorded on the 1798 census of Grimm in Household No. Gm041.
The 1834 census of Grimm records in Household No. 325 that Daniel Volmer moved from Grimm to Schilling in 1834.
- 1775 Grimm Census (Household No. 128).
- 1834 Grimm Census (Households No. 117, 309, 325).
- 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): Gm041.