The Roman god of the underworld and wealth was Pluto.
Pluto was a Roman god associated with the underworld, the dead, and the riches hidden beneath the earth. His name is related to Greek Plouton, meaning “the wealthy one,” a title connected with the precious metals and fertile resources found underground. Roman writers also used Dis Pater, or “Rich Father,” for a closely related underworld deity.
Pluto was identified with the Greek Hades, though Roman religious tradition often emphasized his connection with abundance and agricultural fertility. He ruled the realm of the dead with his consort Proserpina, the Roman counterpart of Persephone. Her seasonal return from the underworld helped explain the cycle of vegetation and the changing seasons.
Pluto was not simply a Roman version of the Christian devil. He was a powerful god who maintained the order of the dead and controlled subterranean wealth. He is commonly confused with Neptune, ruler of the sea, or Jupiter, ruler of the gods; those were his brothers in myth, but each governed a different cosmic realm.