Hades three-headed guard dog Cerberus. The Etruscan god Aita and the Roman gods Dis Pater and Orcus were eventually taken as equivalent to Hades and merged into Pluto, a Latinization of Plouton (", Ploútōn"), itself a euphemistic title often given to Hades. The origin of Hades' name is uncertain, but has generally been seen as meaning "the unseen one" since antiquity. An extensive section of Plato's dialogue "Cratylus" is devoted to the etymology of the god's name, in which Socrates is arguing for a folk etymology not from "unseen" but from "his knowledge ("eidenai") of all noble things". Modern linguists have
Tomb of Orcus (especially her eye) bears the influence of Hellenistic art. Unlike the Mona Lisa, however, she is noted for her grimace or sneer. The Tomb of Orcus II (sometimes distinguished as "the" Tomb of Orcus) was constructed around 325 BC. Its entrance is guarded by paintings of "Charun" (Charon), the keeper of the underworld, and a cyclops (possibly Polyphemus or Geryon). When the tomb was originally discovered, the cyclops was mistaken for the Roman god of the underworld, Orcus (hence the tomb's name). The back wall depicts a funeral procession overseen by "Aita" (Hades), the Etruscan god of the underworld, and