In Greek mythology, Erebus ( /ˈɛrəbəs/), also Erebos (Ancient Greek: Ἔρεβος, "deep darkness, shadow"), was often conceived as a primordial deity, representing the personification of darkness; for instance, Hesiod's Theogony places him as one of the first five beings to come into existence from Chaos. Erebus features little in Greek mythological tradition and literature, but is said to have fathered several other deities by Nyx; depending on the source of the mythology, this union includes Aether, Hemera, the Hesperides, Hypnos, the Moirai, Geras, Styx, and Thanatos.
In Greek literature the name Erebus is also used to refer to a region of the Underworld where the dead had to pass immediately after dying, and is sometimes used interchangeably with Tartarus. I 'll see her damned first; to Pluto's damned lake, by this hand, to the infernal deep, with Erebus and tortures vile also. Hold hook and line, say I. Down, down, dogs! down, faitors! Have we not Hiren here? Shakespeare, King Henry IV (2.4)