Athyras
Ἄθυρας
Athyras (Ἄθυρας), a river of Thrace between Selymbria and Byzantium. (Ptol. 3.11.6; Plin. Nat. 4.11. s. 18. § 47, Sillig; Pliny calls it also Pydaras.)
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.