A Dictionary of Greek and Roman biography and mythology

44. Surnamed THRAX, or the Thracian, a celebrated Greek grammarian, who unquestionably derived his surname from the fact of his father Teres being a Thracian (Suidas); and it is absurd to believe, with the author of the Etymologicum Magnum (p. 277. 53), that he received it from his rough voice or any other circumstance. He himself was, according to some, a native of Alexandria (Suidas), and, according to others, of Byzantium; but he is also called a Rhodian, because at one time he resided at Rhodes, and gave instructions there (Strab. xiv. p.655; Athen. 11.489), and it was at Rhodes that Tyrannion was among the pupils of Dionysius. Dionysius also staid for some time at Rome, where he was engaged in teaching, about B. C. 80. Further particulars about his life are not known.