Castor
the chamberlain and confidential adviser of Septimius Severus. Being the most upright of all the courtiers, he became an object of suspicion and hatred to Caracalla, who upon ascending the throne immediately put him to death, having failed in an attempt, during the lifetime of Severus, to destroy him by treachery. (D. C. 76.14, 77.1.)
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.