Hydarnes (; Old Persian Vidarna "the ripper") was an eminent Persian, the commander of the "Ten Thousand Immortals" during the time of king Xerxes invasion of Greece. Perhaps the most famous episode involving Satrap Hydarnes and his Immortals came at the Thermopylae in 480 BC, when they came into contact with Leonidas of Sparta. Hydarnes is known also from an Aramaic inscription found at Armavir that states his choice of girls for his Harem.