(Εὐτυχιανός), a physician who lived probably in or before the fourth century after Christ, as one of his medical formulae is quoted by Marcellus Empiricus (De Medicam. 100.14. p. 303), who calls him by the title of " Archiater." He may perhaps be the same physician who is called Terentius Eutychianus by Theodorus Priscianus (De Medic. 4.14.)