3. A bishop of Heracleia in Thrace, and a follower of the heresy of Macedonius, was one of the earliest writers on ecclesiastical councils. His work, entitled Συναγωγὴ τῶν Συνοδῶν, is frequently quoted by Socrates and other ecclesiastical historians. (Soc. H. E.1.5, 2.11, 13, 16; Sozom. H. E. Praef.; Niceph. Call. ix.; Epiphan. Haer. 2.8, 9, 17.) He appears to have lived about the end of the reign of Theodosius II., who reigned from A. D. 424 to 450. (Vossius, de Hist. Graec. pp. 307, 314, 494; Fabric. Bibl. Graec. vol. xii. pp. 182,183.)
[P.S]A Dictionary of Greek and Roman biography and mythology
Smith, William
A Dictionary of Greek and Roman biography and mythology. William Smith, LLD, ed. 1890