Tsar Ivan IV Vasilyevich - Ivan the Terrible - was the first grand prince of Moscow from 1533 to 1547 and later ruled as the “Tsar of all Russia” until his death in 1584. Back in the 16th Century when the suffix Terrible was first bestowed on Ivan, it meant ‘awe-inspiring’, ‘powerful’ and ‘formidable’. By the end of his reign, most of his subjects probably felt the word as we understand it today was more apt.