Some of the best nicknames are wasted on serial killers. A wrestler known as The Sydney Mutilator would inspire fear and fanaticism, and if women knew you as The Florida Sex Beast wherever you went, your reputation would precede you like satin sheets on a waterbed.

Unfortunately, these nicknames describe truly horrible human beings. Often, nicknames aren’t necessary when the crimes are so gruesome and the killer’s given name becomes synonymous with ultimate horror. Dahmer and Bundy come to mind, but few know that serial killers have been a scourge on humanity for centuries and their numbers are in the hundreds.

And so, here are the top 10 unknown serial killers.