A Russian ruler was called a Tsar or Czar, depending on your preferred spelling.
Bolsheviks
Ivan IV or Ivan the Terrible
Russia doesn't have kings in the present day. The most recent title used for the monarchial ruler of Russia was "Tsar" (or "Czar"; they're different Romanizations of the same Russian word, which ultimately derives from "Caesar").
What was the title of ruler of hyedrabad in 1947
Russian rulers have had many and varied titles since Rurik established the Russian state. Grand Duke or Grand Prince were both common titles. Ivan III (the Great) was the first to use the title Tsar (Tzar, Csar or Czar), a Russification of the Roman word Caesar. By the time the Romanovs had come to power, it was the standard title applied to all Russian rulers.
Emperor is the title given to the ruler of an empire.
The word "czar" is a term for a leader, most often of a country. It is similar to the Russian term "tsar," which was the king and head ruler of the country.
The title bestowed on a female ruler of Hanover is Electress
tsar
Czar
it's A: Ivan the Terrible