Hades

Hades

He was the brother of Zeus and Poseidon. He brought with himself all the things that are accustomed to by the God of Evil and Hell. Throughout the stories of ancient Greece, the God of the Underworld has always been a bit of an enigma.

Known for having some pseudo names, Hades was also sometimes referred to as "Aidoneus" (def. the "Unseen One").  He also often appears in the Roman literature as "Pluto".

Since mortals deemed it unlucky to utter his proper name out loud, it was common for both Greeks and Romans to refer to the various forms of his name.