Aristarchus of Samothrace (Greek: Ἀρίσταρχος ὁ Σαμόθραξ Aristarchos o Samothrax; c. 220 – c. 143 BC) was an ancient Greek grammarian, noted as the most influential of all scholars of Homeric poetry. He was the head librarian of the Library of Alexandria and seems to have succeeded his teacher Aristophanes of Byzantium in that role. Source: Wikipedia (en)