Russian word for Caesar?
The Russian word (transliterated into English) is "tsar" or "czar". Either spelling is accepted.
tsar or czar Like "Kaiser" in German, the Russian "Tsar" or "Czar" is derived from CAESAR, meaning Emperor. After Octavian Caesar became Caesar Augustus, all the Roman Emperors were known as Caesar, and it became synonymous with Emperor. This I found, as well as the Russian word for King being "Korol' ", in a Wikipedia article about the word Tsar. It's quite comprehensive.