Aetna
Aetna, whose name eventually became that of the volcano Etna, was the daughter of Uranus and Gaia or, by some accounts, of Briareus. When Hephaestus and Demeter were quarrelling over the ownership of Sicily (land of volcanoes and corn) Aetna stepped in to act as arbitrator. She is sometimes regarded as the mother of the Palici. (Grimal, 1990)