The Egyptian god of the underworld is Osiris. He was the son of Geb, the god of the Earth, and Nut, the goddess of the sky. He was married to Isis, the goddess of magic, and was the father of Horus, the god of the sun. Osiris was the ruler of the underworld and was responsible for judging the souls of the dead. He was also associated with fertility and vegetation, and was often depicted as a mummified king.