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

References

Kerkeosiris By Dorothy J. Crawford Page 33