My Russian 3rd-distant cousins

[Lemminkäinen]

I have a big heap of cousins with non-Finnish names, but probably many of them are Americans with Finnish ancestry and also Finland-Swedes. Among all cousins I found 150 with Rusdian first and last name. Some of them can belong to other Slavic groups. I would be happy if someone of Russian forumites could make an estimation where they come from in Russia. I assume that like also in Finland and many other countries surnames give infirmation of locality inside the country. So if you can help me privately, please send me PM.