Oh, I love your list! Especially Eryn (though I think I'd go with Erin for ease), Hallie, Everly and Amity.
Other ideas:
Amaya, Anoushka, Arrietty, Angelica, Avery, Blair, Bronte, Cleo, Celeste, Camilla, Delphi, Danica, Devon, Etta, Effie, Enya, Eden, Fallon, Fenella, Giselle, Genesis, Honor, Hero, Iona, Juno, Juniper, Jessamy, Jerica, Jacinta, Keziah, Kendra, Kiki, Leonie, Livia, Lyra, Mala, Morgan, Marissa, Nova, Nyah, Neriah, Octavia, Paloma, Quinn, Rosina, Rowena, Rivkah, Ramona, Romilly, Saffron, Sutton, Taryn, Tamara, Talitha, Veda, Vashti, Verity, Xanthippe, Zeryn, Zia, Zipporah