My name doesn't matter. I never keep the same one for more than a few days.
~ Maya Brooks

Villains whose real, given names are unknown (if they had one to begin with, e.g. The Thing), simply forgotten (e.g. Witch-King of Angmar), are unpronounceable by human language (e.g. Glgrdsklechhh), or are known only by aliases or conjectural names (e.g. Maya Brooks). Such villains can be enigmatic.

Note: Villains who have official names should not be added to this category.