unique? Not easy?
Okay, these are names that I think I are both good and unusual:
Arwen, Astrid, Araminta, Asia, Alpha, Aphra, Ariel, Anoushka, Angelica, Arrietty, Amberley, Allegra, Bronte, Brodie, Briar, Briley, Brynn, Brogan, Catalina, Christabel, Camryn, Clarissa, Celyn, Caoimhe, Danika, Dulcie, Emery, Enya, Etta, Effie, Evangeline, Eilidh, Fallon, Fenella, Fabia, Fernanda, Giovanna, Giselle, Genesis, Hadleigh, Iona, Jerica, Jessamy, Juniper, Karenza, Katinka, Leandra, Leonie, Mirabelle, Mallory, Miranda, Noelle, Noa, Nuala, Nia, Nyah, Octavia, Peronelle, Pandora, Paloma, Reagan, Romy, Ramona, Romilly, Sylvia, Suzannah, Sorcha, Sutton, Scout, Tamara, Taryn, Xanthe, Xenia, Yvette, Zia, Zillah.
Abel, Asher, Braxton, Brennan, Crispin, Corbin, Eden, Echo, Farris, Fraser, Gareth, Hunter, Ivan, Joachim, Jonty, Joel, Milo, Micah, Nico, Orson, Patrick, Phoenix, River, Rafferty, Sheldon, Storm, Tian, Talon, Xavier, Zebediah.