For other persons with the same name ,see
Theagenes was a historical writer, of uncertain date. Stephanus of Byzantium frequently quotes from a work of his, entitled Macedonica (s. v. Altus (Mygdonia) ), as also from another entitled Carica. It is, perhaps, the same Theagenes, who wrote a work on Aegina, quoted by John Tzetzes.
This article incorporates text from a publication now in the public domain: Smith, William, ed. (1870). "". Dictionary of Greek and Roman Biography and Mythology.