Dionysius
9. A physician, who was a contemporary of Galen in the second century after Christ, and is mentioned as attending the son of Caecilianus, to whom Galen wrote a letter full of medical advice, which is still extant. (Galen, Pro Puero Epilept. Consil., in Opera, vol. xi. p. 357.)
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.