Cios
Κῖος
(Κῖος), a son of Olympus, from whom Cios (Prusa) on the Propontis derived its name, as he was believed to have led thither a band of colonists from Miletus. (Schol. ad Theocrit. 13.30; ad Apollon. Rhod. 1.1177.) Strabo (xii. p.564) calls him a companion of Heracles who founded Cios on his return from Colchis.
From William Smith (ed.), Dictionary of Greek and Roman Biography and Mythology. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.