Pluto (mythology) says that among the Turdetani, it is "Pluto, and not Hades, who inhabits the region down below." In the discourse "On Mourning" by the Greek author Lucian (2nd century AD), Pluto's "wealth" is the dead he rules over in the abyss "(chasma)"; the name "Hades" is reserved for the underworld itself. In Greek religious practice, Pluto is sometimes seen as the "chthonic Zeus" ("Zeus Chthonios" or "Zeus Catachthonios"), or at least as having functions or significance equivalent to those of Zeus but pertaining to the earth or underworld. In ancient Roman and Hellenistic religion, Pluto was identified with a number
Pluto uses "Sao Diêm Vương", which was derived from the Chinese term 閻王 (Yánwáng), as "minh" is a homophone for the Sino-Vietnamese words for "dark" (冥) and "bright" (明)). Some Indian languages use the name Pluto, but others, such as Hindi, use the name of "Yama", the God of Death in Hindu and Buddhist mythology. Polynesian languages also tend to use the indigenous god of the underworld, as in Māori "Whiro". Once Pluto was found, its faintness and lack of a resolvable disc cast doubt on the idea that it was Lowell's Planet X. Estimates of Pluto's mass were revised downward