AIA (or Aea) was the Naiad Nymph of a spring, well or fountain of the town of Aia, also known as Kolkhis (Colchis), at the eastern end of the Black Sea. She was loved by the local river-god Phasis.
AEA, a huntress who was metamorphosed by the gods into the fabulous island bearing the same name, in order to rescue her from the pursuit of Phasis, the river-god. (Val. Flacc. i. 742, v. 426.)
Source: Dictionary of Greek and Roman Biography and Mythology.
Valerius Flaccus, Argonautica 5. 425 ff (trans. Mozley) (Roman epic C1st A.D.) :
"[Depicted on the walls of the palace of Aeetes, King of Kolkhis (Colchis):] In frenzied desire savage Phasis [the rver-god of Kolkhis] pursues [the Nymphe] Aea upon her native hills; in maiden distress and panic she shoots frightened arrows, and now her strength fails from her running to and fro and the god has overcome her, and binds her fast beneath his rapid wave."
- Valerius Flaccus, The Argonautica - Latin Epic C1st AD