King of the underworld and the dead, and god of regret. His consort is Persephone. His attributes are the drinking horn or cornucopia, key, sceptre, and the three-headed dog Cerberus. The screech owl was sacred to him. He was one of three sons of Cronus and Rhea, and thus sovereign over one of the three realms of the universe, the underworld. As a chthonic god, however, his place among the Olympians is ambiguous. In the mystery religions and Athenian literature, Pluto (Plouton, "the Rich") was his preferred name, with Hades more common for the underworld as a place. The Romans translated Plouton as Dis Pater ("the Rich Father") or Pluto.