"I am not the Dread Pirate Roberts," he said. "My name is Ryan. I inherited this ship from the previous Dread Pirate Roberts, just as you will inherit it from me. The man I inherited it from was not the real Dread Pirate Roberts, either. His name was Cummerbund. The real Roberts has been retired fifteen years and living like a king in Patagonia." Then he explained the name was the important thing for inspiring the necessary fear. You see, no one would surrender to the Dread Pirate Westley.
~ Wesley, explaining the truth behind the many secret identities of the Dread Pirate Roberts.

Villainous identities that have been used by more than one character; usually these are comic book supervillains, and often these identities are passed down through generations in a family of evildoers.