SYMAITHOS (or Symaethus) was a River-God of eastern Sikelia (Sicily).
The Symaithos river had its headwaters in the Nebrodes Mountains of north-eastern Sikelia, and flowed around the edges of Mount Aitna to enter the Meditteranean sea, south of the town of Katana. Other personified Sikelian rivers included the Akis to the north, Anapos in the south and Krimisos to the west. The closest river on the Italian mainland was the Kaikinos of Bruttium.
Ovid, Metamorphoses 13. 750 ff (trans. Melville) (Roman epic C1st B.C. to C1st A.D.) :
"Acis was son of River-Nympha Symaethis and Faunus [Pan] was his father."
- Ovid, Metamorphoses - Latin Epic C1st B.C. - C1st A.D.