(), an eminent physician, called by
Stephanus Byzantinus (s. v.Γέα) ὁ περιφανέστατος
ἰατροσοφίστης, was a native of Gea, a place near Petra, in Arabia, and lived in
the reign of the emperor Zenon, A. D. 474-491. He was a pupil of Domnus, whose reputation he eclipsed, and whose scholars he
enticed from him by his superior skill. He was an ambitious man, and acquired both riches and
honours; but his reputation as a philosopher, though he wished to be considered such, was not
very great. (Damascius ap. Suid s. v.Γέσιος, and Phot. Bibl.
242. p. 352b. 3, ed. Bekker.) He may perhaps be the physician mentioned by one of the
scholiasts on Hippocrates. (Dietz, Schol. in Hippocr. et Gal. vol. ii. p.
343, note.) The little medical work that bears the name of Cassius Iatrosophista has been by
some persons attributed to (Gesius, but without sufficient reason. (Fabric. Bibl. Graec. vol. xiii. p. 170, ed. Vet.)