In Greek mythology, Eirene (; , ) or Irene, was a daughter of Poseidon and Melanthea, daughter of Alpheus. She gave her name to Eirene, a small island near the Peloponnese.Plutarch, Quaestiones Graecae, 19 The island was later called Anthedonia and Hypereia, but eventually received the name Calauria after Calaurus, who was also a son of Poseidon.
Note
References Lucius Mestrius Plutarchus, Moralia with an English Translation by Frank Cole Babbitt. Cambridge, MA. Harvard University Press. London. William Heinemann Ltd. 1936. Online version at the Perseus Digital Library. Greek text available from the same website.