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 "during the magistracy of Velu Hulchnie", found elsewhere in the tomb). According to this interpretation, the phrase would translate: Le[ive] erected this monument for posterity [during the magistracy] of Larth Hulchnie and Marce Caliathe. "Marce" is probably a cognate or preform of "Marcus". "Hulchnie" is generally interpreted as the Roman gens "Fulcinius", and "Larth" is believed to be akin to the Greek name "Laertēs"; some have suggested that "Larth Hulchnie" means "Hulchnie, son of Larth". Tomb of Orcus The Tomb of Orcus (), sometimes called the Tomb of Murina (), is a 4th-century BC Etruscan hypogeum (burial chamber) in Tarquinia,