Dionysius
24. A Greek GRAMMARIAN, who instructed Plato when a boy in the elements of grammar. (D. L. 3.5; Appuleius, de Dogmat. Plat. 1.2; Olympiod. Vit. Plat. p. 6, ed. Fischer.) He is probably the same person as the Dionysius who is mentioned in the beginning of Plato's dialogue Ἐρασταί.
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.