Pluto is the Roman god of the underworld and the judge of the dead. Pluto was the son of Saturn. Pluto's wife was Proserpina (Greek name, Persephone) whom he had kidnapped and dragged into the underworld. His brothers were Jupiter and Neptune. People referred to Pluto as the rich one because he owned all the wealth in the ground. People were afraid to say his real name because they were afraid it might attract his attention. Black sheep were offered to him as sacrifices. Pluto was known as a pitiless god because if a mortal entered his Underworld they could never hope to return. Pluto's Greek name is Hades.