Johannes Krenzer, a single farmer, settled in the Volga German colony of Herzog on 14 July 1766 and is recorded there on the 1767 census in Household No. 25.
In 1796, Johannes Krenzer and his family moved from Herzog to Rohleder.
The 1798 census of Ober-Monjou records Nikolaus Krenzer living in Household No. Om42. The 1798 census of Mariental records Kaspar Krenzer living in Household No. Mt05.
The 1767 census records that Johannes Krenzer came from the German village of Roding in Bayern (Bavaria).
- 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): Mt05, Om42, Rl28, Mv0839.
- Pleve, Igor. Einwanderung in das Wolgagebiet, 1764-1767 Band 2 (Göttingen: Göttinger Arbeitskreis, 2001): 94.