Cynaethus or Cinaethus (Greek: Κύναιθος or Κίναιθος) of Chios was a rhapsode, a member of the Homeridae, sometimes said to have composed the Homeric Hymn to Apollo.
The main source of information on Cynaethus is a Scholium to Pindar's second Nemean ode.
He was the first to recite the Homeric poems at Syracuse, Magna Graecia, which he did during the 69th Olympiad (504-501 BC).
It was once argued that the dating made no sense because the Homeric poems must have reached Syracuse much earlier.
No doubt basing himself on this or a similar text, Eustathius of Thessalonica names Cynaethus as the first to disseminate the Homeric poems and as a forger of Homeric verses.