I think
Morgana's great, and not too dark or witchy, although that is part of what adds to the charm imo. It translates into the modern world. I've noticed a few adult Morganas popping up, some of whom are bright and bubbly, and it still works. My mum considered it for me, and it's my 4th favourite name, so I think it's very much usable.
Dreaming of...
Pandora Beatrix Clio ✦ Caspian Sherlock Walter ✦ Artemis Saffron Kit ✦ Ptolemy Arthur George
Horatio ✦ Lysander ✦ Nikolai ✦ Zephram ✦ Ambrose ✦ Indigo ✦ Cedric
Evanthe ✦ Morgana ✦ Valkyrie ✦ Ziva ✦ Demelza ✦ Zenobia ✦ Marigold