...the dog may be named after a god, not the "dwarf planet."
from Wikipedia.....
Pluto is an alternate name for the Greek god Hades, but was more often used in Roman mythology in their presentation of the god of the underworld. He abducted Proserpina (Gr. Persephone), and her mother Ceres (Gr. Demeter) caused winter in her grief. Although often envisioned today as evil (due to the fact of his similarities to the Christian demon Satan), the Romans did not view him as such.
Pluto was originally not the god of the underworld. Pluto is cognate with the Greek word "Ploutos" (wealth), and was considered by the Romans as the giver of gold, silver, and other subterranean substances. Because these "gifts" were mined, Pluto became recognized as the god of the physical underworld, which in turn helped him become recognized as the god of the spiritual underworld and thus death. This brought about his mythological relationship to the Greek god Hades. Because the mythology of the gods is more known than the actual religious roles of the gods, Pluto is identified as the counterpart to the Greek Hades (which is only wholly true in Mythology).
The dwarf planet Pluto is named after him.
Pluto should not be confused with the Greek god Plutus, the god of wealth.