What was the first name of the Russian ruler called “The Terrible”?
Answer: Ivan the Terrible, or Ivan IV, was the first tsar of Russia. During his reign (1533-1584), Ivan acquired vast amounts of land through ruthless means and turned Russia from a medieval state into a world empire.
Intelligent yet prone to outbreaks of uncontrollable rage, many believe him to have been mentally ill. In one such outburst, he killed his son and heir Ivan Ivanovich. It is generally agreed that his reign established the current Russian territory and centralized government for centuries to come.