In Greek mythology, Leucosia (, from ) was one of the Sirens. She was the daughter of the river-god Achelous by either the Muses, MelpomeneTzetzes, Chiliades 1.14, line 339 & 348 or Terpsichore.Tzetzes, Chiliades 6.40 Leucosia's sisters were Parthenope and Ligeia.Eustathius, l.c. cit.; Strabo, Geographica 5.246, 252Lycophron, Alexandra 720-726Servius commentary on Virgil, Georgics 4.562Tzetzes, Chiliades 1.14, line 337 & 6.40 Leucosia's name was given to the island opposite to the Sirens' cape,Strabo, Geographica 6.1.1 the modern Licosa.Leucosia (Italy) 10 Licosa Her body was found on the shore of Poseidonia.Lycophron, Alexandra 720

Ancient scholiasts recorded several etymologies for the name Leucosia: she was said to be "the White One" (from the Greek leukos, "white"), to have white ears, to be the daughter of a certain Leucus, or to have the ears of Leucus.Tzetzes, Ad Lycophronem, 724

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References Lycophron, The Alexandra translated by Alexander William Mair. Loeb Classical Library Volume 129. London: William Heinemann, 1921. Online version at the Topos Text Project. Lycophron, Alexandra translated by A.W. Mair. London: William Heinemann; New York: G.P. Putnam's Sons. 1921. Greek text available at the Perseus Digital Library. Strabo, The Geography of Strabo. Edition by H.L. Jones. Cambridge, Mass.: Harvard University Press; London: William Heinemann, Ltd. 1924. Online version at the Perseus Digital Library. Strabo, Geographica edited by A. Meineke. Leipzig: Teubner. 1877. Greek text available at the Perseus Digital Library. Tzetzes, John, Book of Histories, Book I translated by Ana Untila from the original Greek of T. Kiessling's edition of 1826. Online version at theio.com