Peter, who broke his enemies on the rack and hanged them in Red Square, who had his son tortured to death, is Peter the Great. But Nicholas, whose hand was lighter than that of any tsar before him, is "Bloody Nicholas". In human terms, this is irony rich and dramatic, the more so because Nicholas knew what he was called.
Robert K. Massie, Nicholas and Alexandra
irony, peter-the-great, tsar, tsar-nicholas-ii