Here's why:
* Uncommon Name: "Agathena" is not a widely known or used name. It's likely to be unfamiliar to most readers.
* Spelling Variations: It's possible a similar name like "Agatha" or "Athena" has been used, but the specific name "Agathena" is very rare.
* Lack of Historical Presence: The name doesn't appear to have significant historical or cultural presence, making it less likely to be chosen by authors.
If you are interested in finding books with similar names, you could try searching for books with "Agatha" or "Athena" in the title, author, or character names. You could also use online databases like Goodreads or LibraryThing to find books that might feature a character with a similar name.