Sibyntius
Σιβύντιος
(Σιβύντιος), a reader and a slave of the orator Theodectes of Phaselis, who died before B. C. 333, was the first slave who professed the art of oratory. He wrote some works on rhetoric, which are mentioned by Suidas (s.v.) (Comp. Westermann, Geschichte der Griech. Beredtsamkeit, § 50, n. 6.)
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.