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
Names of God in Judaism the Elohist) are named for their usual names for God (YHWH and Elohim respectively). The seven names of God that, once written, cannot be erased because of their holiness are the Tetragrammaton, El, Elohim, Eloah, Elohai, El Shaddai, and Tzevaot. In addition, the name Jah—because it forms part of the Tetragrammaton—is similarly protected. Rabbi Jose considered "Tzevaot" a common name and Rabbi Ishmael that "Elohim" was. All other names, such as "Merciful", "Gracious" and "Faithful", merely represent attributes that are also common to human beings. The name of God used most often in the Hebrew Bible is YHWH (), also