DEMARATOS

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Demaratus, or Demaratos (Greek: Δημάρατος), was a king of Sparta from around 515 BC until 491 BC, 15th of the Eurypontid line, successor to his father Ariston. As king, he is known chiefly for his opposition to the co-ruling Spartan king, Cleomenes I. He later fled to Achaemenid Persia where he was given asylum and land, and fought on the Persian side during the Second Persian invasion of Greece.