Tyras, ae, m., = Τύρας,
a river in Sarmatia , now the Dniester , Mel. 2, 1, 7; Ov. P. 4, 10, 50.—Called also Tyra , Plin. 4, 12, 26, § 82.
TYRAS(ό Τύρας, Strab. 2. p. 107), one of the principal rivers of European Sarmatia. According to Her...
Dictionary of Greek and Roman Geography