What does aonian mean?
The definition of aonian
A*o”ni*an, a.
Etym: [From Aonia, a part of Boeotia, in Greece.]

Pertaining to Aonia, Boeotia, or to the Muses, who were supposed to dwell there. Aonian fount, the fountain of Aganippe, at the foot of Mount Helicon, not far from Thebes, and sacred to the Muses.