Dear Faldage: Thanks for the suggestion. I found a site much to long to interest the group, but with one excerpt worth quoting.

Morgana

This name has several possible origins, or understandings of its origin. The literary character "Morgain la Fee" appears in Italian versions of the Arthurian tales as "Fata Morgana". [De Felice] Morgana may also be understood as a modern "feminization" of the masculine given name Morgan (q.v.).

There appears to be no evidence that Morgana was used as a name by real people before 1600.

The "DeFelice" is just a bibliography.