Wikipedia
Adamantius was an ancient physician, bearing the title of Iatrosophista (; broadly, "professor of medicine"). Little is known of his personal history, except that he was Jewish by birth, and that he was one of those who fled from Alexandria at the time of the expulsion of the Jews from that city by the Patriarch Cyril of Alexandria in 415. He went to Constantinople, was persuaded to embrace Christianity, apparently by Archbishop Atticus of Constantinople, and then returned to Alexandria.
He is the author of a Greek treatise on physiognomy in two books. It is still extant, and borrows in a great measure (as Adamantius himself confesses) from Polemon's work on the same subject. It is dedicated to "Constantius", who is supposed by Fabricius to be the same Constantius who married Placidia (i.e. Constantius III), the daughter of Theodosius the Great, and who reigned for seven months in conjunction with the Emperor Honorius. It was first published in Greek in Paris in 1540. Several of his medical prescriptions are preserved by Oribasius and Aëtius.
Another of his works, (Lat. De Ventis), is quoted by the Scholiast to Hesiod, and an extract from it is given by Aëtius Amidenus. The text was published in 1864 by Valentin Rose in Anecdota Graeca.
Adamantius was a 4th-century Christian writer sometimes mistaken for Origen. He may have come from Asia Minor or Syria but very little is known of him. He wrote anti-Gnostic works in Greek.
Adamantius (; fl. 474–479) was a politician of the Eastern Roman Empire, praefectus urbi of Constantinople (474–479), patricius and honorary consul.
Adamantius was the son of Vivianus, consul in 463 and praetorian prefect of the East; his brother was Paulus, consul in 512.
Between 474 and 479, Adamantius held the office of praefectus urbi of Constantinople.
In 479 he is attested as patricius. That year he was conferred consular honours by Emperor Zeno and sent as envoy to the rebel general Theodoric Strabo. He went to Thessalonica, where he freed the ex-consul Iohannes from an enraged mob, and joined with Sabinianus Magnus at Edessa; they reached Theodoric in Dyrrachium, where they started negotiations, but Zeno recalled them back when the rebels kept on attacking imperial territories.