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For the butterfly, see Troides aeacus.
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Aeacus (/ˈəkəs/; also spelled Eacus; Greek: Αἰακός) was a mythological king of the island of Aegina in the Saronic Gulf. He was the father of Peleus, Telamon and Phocus and was the grandfather of Achilles and Telemonian Ajax.


Aeacus was the son of Zeus and Aegina, a daughter of the river-god Asopus.[1] He was born on the island of Oenone or Oenopia, where Aegina had been carried by Zeus to secure her from the anger of her parents; afterward, this island became known as Aegina.[2][3][4][5][6] According to some accounts, Aeacus was a son of Zeus and Europa. Some traditions related that, at the time when Aeacus was born, Aegina was not yet inhabited, and that Zeus either changed the ants (μύρμηκες) of the island into the men (Myrmidons) over whom Aeacus ruled, or he made the men grow up out of the earth.[2][7][8] Ovid, on the other hand, supposed that the island was not uninhabited at the time of the birth of Aeacus, instead stating that during the reign of Aeacus, Hera, jealous of Aegina, ravaged the island bearing the name of the latter by sending a plague or a fearful dragon into it, by which nearly all its inhabitants were carried off. Afterward, Zeus restored the population by changing the ants into men.[9][10][11]

These legends seem to be a mythical account of the colonization of Aegina, which seems to have been originally inhabited by Pelasgians, and afterwards received colonists from Phthiotis, the seat of the Myrmidons, and from Phlius on the Asopus. While he reigned in Aegina, Aeacus was renowned in all Greece for his justice and piety, and was frequently called upon to settle disputes not only among men, but even among the gods themselves.[12][13] He was such a favourite with the latter, that when Greece was visited by a drought as a consequence of a murder that had been committed, the oracle of Delphi declared that the calamity would not cease unless Aeacus prayed to the gods to end it.[2][14] Aeacus prayed, and as a result, the drought ceased. Aeacus then demonstrated his gratitude by erecting a temple to Zeus Panhellenius on Mount Panhellenion,[15] and afterward, the Aeginetans built a sanctuary on their island called Aeaceum, which was a square temple enclosed by walls of white marble. Aeacus was believed in later times to be buried under the altar of this sacred enclosure.[16]

A legend preserved in Pindar relates that Apollo and Poseidon took Aeacus as their assistant in building the walls of Troy.[17] When the work was completed, three dragons rushed against the wall, and though the two that attacked the sections of the wall built by the gods fell down dead, the third forced its way into the city through the portion of the wall built by Aeacus. Thereafter, Apollo prophesied that Troy would fall at the hands of Aeacus's descendants, the Aeacidae.

Aeacus was also believed by the Aeginetans to have surrounded their island with high cliffs in order to protect it against pirates.[18] Several other incidents connected to the story of Aeacus are mentioned by Ovid.[19] By Endeïs Aeacus had two sons, Telamon (father of Ajax and Teucer) and Peleus (father of Achilles), and by Psamathe a son, Phocus, whom he preferred to the former two sons, both of whom conspired to kill Phocus during a contest, and then subsequently fled from their native island.

After his death, Aeacus became one of the three judges in Hades, along with the Cretan brothers Rhadamanthus and Minos),[20][21] and, according to Plato, was specifically concerned with the shades of Europeans upon their arrival to the underworld.[22][23] In works of art he was depicted bearing a sceptre and the keys of Hades.[2][24] Aeacus had sanctuaries in both Athens and in Aegina,[16][25][26] and the Aeginetans regarded him as the tutelary deity of their island by celebrating the Aeacea in his honor.[27]

In The Frogs (405 BC) by Aristophanes, Dionysus descends to Hades and proclaims himself to be Heracles. Aeacus, lamenting the fact that Heracles had stolen Cerberus, sentences Dionysus to Acheron to be tormented by the hounds of Cocytus, the Echidna, the Tartesian eel, and Tithrasian Gorgons.

Alexander the Great traced his ancestry (through his mother) to Aeacus.


  1. ^ Schmitz, Leonhard (1867), "Aeacus", in Smith, William, Dictionary of Greek and Roman Biography and Mythology, 1, Boston, pp. 22–23 
  2. ^ a b c d Bibliotheca iii. 12. § 6
  3. ^ Gaius Julius Hyginus, Fabulae 52
  4. ^ Pausanias ii. 29. § 2
  5. ^ comp. Nonn. Dionys. vi. 212
  6. ^ Ovid, Metamorphoses vi. 113, vii. 472, &c.
  7. ^ Hesiod, Fragm. 67, ed. Gottling
  8. ^ Pausanias, l.c.
  9. ^ Ovid, Metamorphoses vii. 520
  10. ^ comp. Hygin. Fab. 52
  11. ^ Strabo, viii. p. 375
  12. ^ Pindar, Isthmian Odes viii. 48, &c.
  13. ^ Pausanias, i. 39. § 5
  14. ^ Diodorus Siculus, iv. 60, 61
  15. ^ Pausanias, ii. 30. § 4
  16. ^ a b Pausanias, ii. 29. § 6
  17. ^ Pindar, Olympian Odes viii. 39, &c.
  18. ^ Pausanias, ii. 29. § 5
  19. ^ Ovid, Metamorphoses vii. 506, &c., ix. 435, &c
  20. ^ Ovid, Metamorphoses xiii. 25
  21. ^ Horace, Carmen ii. 13. 22
  22. ^ Plato, Gorgias p. 523
  23. ^ Isocrates, Evag. 5
  24. ^ Pindar, Isthmian Odes viii. 47, &c.
  25. ^ Hesychius s.v.
  26. ^ Schol. ad Pind. Nem. xiii. 155
  27. ^ Pindar, Nemean Odes viii. 22


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