
Originally Posted by
Wikipedia
Hades (from Greek ᾍδης, Haidēs, originally Ἅιδης, Haidēs or Ἀΐδης, Aïdēs; of uncertain origin[1], although it has been ascribed to Greek "unseen"[2]) refers to both the ancient Greek Underworld and the God of the Dead. The word originally referred to just the god; ᾍδού, Haidou its genitive, was short for "the house of Hades". Eventually, the nominative, too, came to designate the abode of the dead.