I like
Daisy!
I know a
Daisy who's 12. She's very bright and mature for her age, and her name definitely suits her. I don't see
Daisy as exclusively for little girls. It's youthful, but I've also seen it pegged as an "old-lady" name, so I don't think it's by any means restricted to one age group as far as how well it "works".
Currently Loving:
G: Athena Lark, Cyra Lenore, Daphne Cordelia, Junia Sibyl, Penelope Susanna, Theodora Ivy, Tullia Victorine
B: Arthur Columba, Blaise Prosper, Cormac Ulysses, Desmond Emrys, Ferdinand Atlas, Panos Dimitri, Robin Emeric