(Ἀριστογένης), the name of two Greek physicians mentioned by Suidas, of whom one was a native of Tlasos, and wrote several medical works, of which some of the titles are preserved. The other was a native of Cnidos, and was servant to Chrysippus, the philosopher, according to Suidas; or rather, as Galen says (de Ven. Sect. adv. Erasistr. Rom. Deg. 100.2, de Cur. Rat. per Ven. Sect. 100.2, vol. xi. pp. 197, 252), he was a pupil of the physician of that name, and afterwards became physician to Antigonus Gonatas, king of Macedonia, B. C. 283-239. A. physician of this name is quoted by Celsus, and Pliny. Hardouin (in his Index of authors quoted by Pliny) thinks that the two physicians mentioned by Suidas were in fact one and the same person and that he was called " Cnidius" from the place of his birth, and " Thasius" from his residence ; this, however, is quite uncertain. (Fabric. Bibl. Gr. vol. xiii. p. 83, ed. vet.; Kühn, Additam. ad Elenchum Medicor. Veter. a Jo. A. Fabricio, &c. exhibitum, Lips. 1826, 4to., fascic. iii. p. 10.)