PELOPS, in fabulous history, the son of Tantalus king of Phrygia, went into Elis, where he married Hippodamia the daughter of Oenomaus king of that country; and became so powerful, that all the territory which lies beyond the Isthmus, and comprises a considerable part of Greece, was called Peloponnesus, that is, the island of Pelops, from his name, and the word Nesos.