Erebus

Erebus, or Erebos, was the personification of darkness. Hesiod identifies him in Theogony as one of the first five beings in existence, born of Chaos. Erebus features little in Greek mythology and literature, but is said to have fathered several other deities with Nyx; depending on the source the mythology, this union includes Aether, Hemera, the Hesperides, Hypnos, the Moirai, Geras, Styx, Charon, and Thanatos.

In Greek literature, Erebus is also used as the name of a region of the Greek underworld where the dead pass immediately after dying and is sometimes used interchangeably with Tartarus.

According to the Greek oral poet Hesiod's Theogony, Erebus is the offspring of Chaos and brother to Nyx.