A Dictionary of Greek and Roman biography and mythology

(Σώπολις) a physician who instructed Aetius (the heretic, not the physician) in medicine, in the former half of the fourth century after Christ. A high character is given him by Philostorgius, who says he was inferior to none of his contemporaries (Hist. Eccles. 3.15, p. 52); St. Gregory of Nyssa, on the other hand, without naming Sopolis, says that Aetius became servant to a quack doctor (ἀγύρτης), from whom he picked up his knowledge of physic. (Cont. Eunom. i. p. 293.)

[W.A.G]