A Dictionary of Greek and Roman biography and mythology

of Heracleia in Pontus, a Greek geographer, lived after Ptolemy, whom he frequently quotes, and before Stephanus of Byzantium, who refers to him, but his exact date is uncertain. If he is the same Marcianus as the one mentioned by Synesius (Ep. 103) and Socrates (H. E. 4.9), he must have lived at the beginning of the fifth century of the Christian era.