Hermodorus (Greek: Ἑρμόδωρος), who lived in the 4th century BC, is said to have circulated the works of Plato, and to have sold them in Sicily. Hermodorus himself appears to have been a philosopher, for we know the titles of two works that were attributed to him: On Plato (Greek: Περὶ πλάτωνος), and On Mathematics (Greek: Περὶ μαθημάτων).
References
Hermodorus Wikipedia(Text) CC BY-SA