Theagenes
3. A Greek grammarian, a native of Cnidus, who was one of the instructors of Herodes Atticus in criticism. (Philost. Vit. Soph. 13, p. 243, ed. Kayser.)
From William Smith (ed.), Dictionary of Greek and Roman Biography and Mythology. Text provided under a CC BY-SA license by Perseus Digital Library, http://www.perseus.tufts.edu, with funding from the National Endowment for the Humanities and Tufts University. Data accessed from https://github.com/PerseusDL/canonical-pdlrefwk/ on 17 October 2026.