Do an internet search for Stenka Razin as a transliteration of the name and you'll find plenty of information about the man and the Russian ballad (which I've been known to sing myself in younger days). (Lyrics certainly available in Russian). The tune for The Carnival is Over is essentially identical to the original. (Literal) Translations of the Russian are available but I don't know if there are any in verse for singing.

Mick