These
names are used primarily to refer to historical persons. They are not
commonly used by other people.
Lenin Ленин HistorySurname adopted by the Russian revolutionary and founder of the former Soviet state Vladimir Lenin (1870-1924), whose birth surname was
Ulyanov. He probably adapted it from the name of the River Lena in Siberia.
Stalin Сталин HistorySurname adopted by the Russian leader Joseph Stalin (1878-1953) during his revolutionary years. He was an ethnic Georgian, born as Ioseb Jughashvili. He derived it from Russian
сталь (stal) meaning
"steel".