In 1789, Johannes Heinrich [Hacks recorded in error] moved from Volmer to Leichtling.
Johannes Heinrich from Volmer and his family are recorded on the 1798 census of Leichtling in Household No. Lg40.
The death of Johannes Heinrich in 1824 on the 1834 census of Leichtling in Household No. 28. His descendants are recorded on the 1834 census of Leichtling in Households No. 23, 28, 51, 87).
- 1834 Leichtling Census (Households No. 23, 28, 51, 87).
- 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): Lg40, Mv2922.