Maps and lists of villages in Russia can be found at these web sites:
German-Russian Settlement maps 1700s to 1800s: https://library.ndsu.edu/grhc/index.php/research-history/germans-russia/german-villages-maps/
German Russian Volga Area: https://www.volgagermans.org/resources/maps/
German Russian Settlement areas: https://www.germansfromrussiasettlementlocations.org/