In Greek mythology, Erebus (/ ˈɛrəbəs /; [1] Ancient Greek: Ἔρεβος, romanized: Érebos, lit. '"darkness, gloom"'), [2] or Erebos, is the personification of darkness. In Hesiod 's Theogony, he is the offspring of Chaos, and the father of Aether and Hemera (Day) by Nyx (Night); in other Greek cosmogonies, he is the father of Aether ...