Chæremon was a Stoic philosopher and historian of Alexandria who lived during the first century after Christ. He was for a time librarian at the Serapeum in Alexandria, and afterward went to Rome to become a tutor of Nero. His chief writings were a history of Egypt, a work on Hieroglyphics, and another on Comets (mentioned by Origen in his Contra Cels. I. 59). He also wrote on grammatical subjects. His works, with the exception of a fragment of the first, are no longer extant. Cf. Eusebius’ Præf. Evang. V. 10, and Suidas,s.v. ᾽Ωριγένης.