Xenophon
3. A native of Cos, and a descendant of the family of the Asclepiadae, who was a physician to the emperor Claudius, and who obtained from him certain privileges for his native island. He was afterwards induced by Agrippina to murder the emperor by means of a poisoned feather, which he introduced into his mouth under the pretence of making him vomit, A. D. 54. (Tac. Ann. 12.61, 67.)
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.