Gibbon's Chapter 53 notes the following
the possession of Cyprus, Rhodes, and Crete, was accompanied by the fifty islands of the Aegean or Holy Sea
I was unfamiliar with the reference to the Aegean Sea as the Holy Sea, and I tried investigating. I thought there could be a reference to the Greek or Latin etymology of the word, but an investigation of the word root notes that we don't know the derivation. Furthermore, Wikipedia notes that the sea used to be called the Archipelago by most of the people around it.
Hence, can someone explain Gibbon's reference to the "Holy Sea"?