I came across this name when I read it in a book series some years ago. The character was a young Native American girl, and it took the protagonist awhile to get used to her name (as it did for me). I eventually grew to like the name a lot, and while I don't like it quite as much now, I still really like it and I wish that I felt it was more usable. I actually like it more than
Dawn (which I think is a safer choice). I don't think it sounds ditzy; cute, definitely, but perhaps a bit on the twee side. For that reason I wouldn't personally use it as a first name, but it could make an interesting middle.
Maybe it coulg be an nn for
Fiona,
Fionnuala,
Frances,
Francesca,
Françoise? I think it could be one of those nicknames that doesn't need to be connected to the given name, though.