In Greek mythology, Iasus (; Ancient Greek: Ἴασος) or Iasius (; Ἰάσιος) was a king of Argos.

Family According to Hellanicus of Lesbos, Phoroneus had at least three sons: Agenor, Jasus (Iasus) and Pelasgus.Eustathius on Homer, 385.40

According to the mythographer Apollodorus, Iasus was the son of Argus and Ismene (daughter of Asopus) and thus brother of Argus Panoptes.Apollodorus, 2.1.3. In a Scholia on Euripides' Orestes, Triopas and Sosis are called his parents and Pelasgus is his brother.Scholia on Euripides, Orestes 932 Pausanias described Iasus as the son of Triopas (son of Phorbas) and brother of Agenor.Scholia on Homer, Odyssey 18.246; Eustathius on Homer, p. 1465 Generally most scholars agree that Iasus was the father of IoApollodorus, 2.1.3; Pausanias, 2.16.1. by Leucane. Possibly by the latter, he also fathered Arestor, father of Pelasgus who migrated to Arcadia.Scholion on Euripides, Orestes 1646

+Comparative table of Iasus' familyRelationNamesSourcesHellanicusSch. on HomerSch. on Eurip.HerodotusApollodorusPausaniasEustathiusParentagePhoroneus✓✓✓Triopas and Sois✓Argus✓Argus and Ismene✓Triopas✓SiblingsAgenor✓✓✓✓Pelasgus✓✓✓ ✓✓Argus Panoptes✓Messene✓WifeLeucane ✓ ChildrenIo ✓✓✓✓ Arestor✓

Reign After the death of Phoroneus or Triopas, the two elder brothers, Pelasgus and Iasus, divided his dominions between themselves in such a manner that Pelasgus received the country about the river Erasmus, and built Larissa, and Iasus the country about Elis. After the death of these two, Agenor, the youngest, invaded their dominions, and thus became king of Argos.Hellanicus of Lesbos, Fragm. p. 47, ed. Sturz.; Scholia on Homer, Iliad 3.75 According to Pausanias, he was the successor of his father Triopas on the throne of Argos while his brother Agenor succeeded him as the king afterwards.Pausanias, Graeciae Descriptio 2.16.1

Notes

References

Apollodorus, The Library with an English Translation by Sir James George Frazer, F.B.A., F.R.S. in 2 Volumes, Cambridge, MA, Harvard University Press; London, William Heinemann Ltd. 1921. ISBN 0-674-99135-4. Online version at the Perseus Digital Library. Greek text available from the same website. Fowler, Robert L., Early Greek Mythography. Volume 2: Commentary. Oxford University Press. Great Clarendon Street, Oxford, OX2 6DP, United Kingdom. 2013. Pausanias, Description of Greece with an English Translation by W.H.S. Jones, Litt.D., and H.A. Ormerod, M.A., in 4 Volumes. Cambridge, MA, Harvard University Press; London, William Heinemann Ltd. 1918. . Online version at the Perseus Digital Library Pausanias, Graeciae Descriptio. 3 vols. Leipzig, Teubner. 1903. Greek text available at the Perseus Digital Library.