Certonium
Κερτώνιον
Certonium or CERTONUS (Κερτώνιον, Κερτωνός), a place in Mysia, only mentioned by Xenophon (Xen. Anab. 7.8.8), on the road between Adramyttium and Atarneus. It has been conjectured that it may be the Cytonium (Κυτώνιον) of Theopompus (Steph. s. v. Κυτώνιον). But Cytonium was between Mysia and Lydia; and Xenophon's Certonus is in Mysia.
From William Smith (ed.), Dictionary of Greek and Roman Geography. 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.