Ivan the Terrible
Nicknames are usually cute endearments we give to our best pals or cherished loved ones. But sometimes, history attributes way creepier nicknames to loathsome figures from the past.
Take Ivan the Terrible for example. Suffering from violent, paranoid delusions, he earned a ghastly reputation for slaughtering his political opponents while suppressing free speech in Russia. Ivan's armies once destroyed an entire town, simply because the Tsar had a misinformed hunch they were plotting against him. Oh, and he "accidentally" killed his own son with a giant walking stick in 1581.
Need we go on? The man was truly terrible!