Cyaneus

CYA´NEUS (Κυάνεος, Ptol. 5.10.2; Plin. Nat. 6.3. 4), a river of Colchis, a little to the south of Dioscurias. According to Pliny, it must have been a river of some size; and he designates both it and the Hippus, which fell into the Euxine near it, as vasti amnes.I t has been conjectured that it is the same river which Scylax (p. 32) called the Gyenus (or, according to Gail's reading, Tyenus). Ritter (Erdk. vol. 2. p. 915) speaks of a castle called Gonieh in the neighbourhood, which perhaps confirms the original form of the word Gyenus.