In Egyptian mythology, Horus was the child of Isis and Osiris. Osiris was the original divine pharaoh of Egypt, who had been murdered by his brother Set (by interpretatio graeca, identified with Typhon or Chaos), mummified, and thus became the god of the underworld. The Greeks melded Osiris with their underworldly Hades to produce the essentially Alexandrian syncretism known as Serapis.