Love Romilly and Arabella
These are the most unusual I can think of but they're still probably repeats, looking at the number of suggestions you've had already:
Alyona, Adrielle, Alexandria, Asthina, Allegra, Anoushka, Adenike, Averil, Brunhilda, Calypso, Calliope, Christabel, Catelina, Caliantha, Danika, Desdemona, Ekaterina, Electra, Eriskay, Elisaveta, Evadne, Elianne, Fenella, Fabia, Frederika, Graciella, Giovanna, Geraldine, Griselda, Henrietta, Imelda, Isadora, Jacinta, Jocasta, Jessamine, Jerica, Josette, Karensa, Kimora, Lavender, Leandra, Larissa, Lavinia, Leticia, Mirabelle, Melania, Nerissa, Neriah, Octavia, Peronelle, Paloma, Pandora, Rhiannyd, Rosina, Robina, Suzette, Summertime, Tatiana, Tamika, Teresina, Thomasina, Ulrika, Virginia, Wilhemina, Xanthippe, Yesenia