Orthrus - Wikipedia, the free encyclopedia
Orthrus (Greek: Ὄρθρος, Orthros) or Orthus (Greek: Ὄρθος, Orthos) is a two-headed dog in Greek mythology, a doublet (brother) of Cerberus, both whelped by the chthonic monsters Echidna and Typhon, and among the fearsome brood listed in Hesiod's Theogony....