Eudoxus was of a mild and timid disposition. When he baptised Valens (A.D. 367) he must have been extremely old, since he had studied theology fifty-five years before, under Lucian, a learned and pious martyr. Philostorg. 1. ii. c. 14-l6, 1. iv. c. 4 with Godefroy, p. 82, 206, and Tillemont, Mem Eccles. tom. v. p. 474-480, etc.