Aethusa

Aethusa (Gr. Αἵθουσα) was in Greek mythology a daughter of Poseidon and Alcyone, who was beloved by Apollo, and bore to him Eleuther.

The word aethusa was used as an epithet for a portico that was open to the sun, that is, Apollo.

According to Pliny's Naturalis Historia, Aethusa is also the eponym of the Italian island which is now called Linosa