Martyrius, son of Adamantius, is the author of a work entitled De b muta et v vocali.  The explicit of codex Monacensis 766 identifies him as grammaticus and Sardianus, i.e. an individual from Sardis.  We cannot be certain that he was actually a grammaticus, but may observe that Martyrius himself calls his father a doctor elocutionis Latinae.  As regards his origins, the adjective Sardianus accords well with the knowledge of Greek that emerges clearly from his work and with the cultural milieu in which he must have lived - at least if Bücheler is correct in identifying the Memnonius whose speech Martyrius claims to have heard personally with the father of the famous poet Agathias.  Martyrius’ life ought then to be dated to the 6^th c. AD: certainly before 580 AD, and perhaps to the first half of the century (Kaster).  [A. Balbo–S. Mollea; tr. C. L. Caterine].