I did pick Rowan, which also happens to be the name that a good friend of mine gave her elder daughter, but I'm also fond of the name Beryl, which is a green stone and a British name more common around 50 years ago than it is today. As others have noted, Rowan is used a good bit in fantasy works, but I think Beryl is relatively rare and still has a reference point in the natural world, as it is a mineral. (I think it's Be on the periodic table of elements, but my memory probably shouldn't be trusted on that part.) It also makes me think of the names Meryl and Merle, as in Merle Oberon, whose surname reminds me of fairies because of Midsummer Night's Dream. :D (Those also wouldn't be bad names, and they're not overused.) FWIW, Bracken sounds awful for a name of anything that isn't evil and twisted. (Unless Bracken IS evil and twisted, in which case go for it.)