Didymarchus

• Didymarchus (Greek: Διδύμαρχος) is mentioned by Antoninus Liberalis (23) as the author of a work on Metamorphoses, of which the third book is there quoted.
• Didymarchos son of Apollonios was a
  Ptolemaic
  Egypt.

References

•  This article incorporates text from a publication now in the public domain: Schmitz, Leonhard (1870). "Didymarchus". In Smith, William (ed.). Dictionary of Greek and Roman Biography and Mythology.
• Kerkeosiris By Dorothy J. Crawford Page 33
  ISBN 0-521-03585-6