In Greek mythology, Iasus (Ancient Greek: Ἴασος) or Iasius (Ancient Greek: Ἰάσιος) was the name of several individuals: * Iasus, king of Argos. His genealogy is confused; according to different sources, he was: * Son of Phoroneus, brother of Agenor and Pelasgus * Son of Argus and either Evadne or Peitho * Son of Argus Panoptes and Ismene, daughter of Asopus; possible father of Io * Son of Io * Son of Triopas and again brother of Pelasgus and Agenor; successor to Agenor on the throne; possibly the father of Io by Leucane * Iasus (Iasius), father of Atalanta by Clymene, daughter of Minyas; he was the son of King Lycurgus of Arcadia by either Eurynome or Cleophyle. His brothers were Ancaeus, Epochus and Amphidamas. * Iasus (Iasius), one of the Dactyli or Curete