From your lists I like Alyssa, Laila, Hunter and Callum best (love Callum).
Other more unusual ideas:
Girls:
Arden, Ayla, Asha, Asia, Anika, Ashton, Aisling, Avery, Aubrey, Astrid, Ailsa, Amberley, Aeryn, Bryony, Brynn, Briley, Brenna, Belen, Bronte, Brodie, Carlotta, Caoimhe, Celyn, Cecily, Celeste, Camilla, Calista, Candida, Clea, Coco, Cleo, Cornelia, Dakota, Dylan, Daria, Diya, Dulcie, Dixie, Darrell, Devon, Effie, Etta, Enya, Eriskay, Eilidh, Flavia, Fenella, Fallon, Farrah, Fabia, Genesis, Giselle, Hadley, Harleigh, Halle, Hebe, Hero, Hester, Harmony, Isolde, Inga, Irma, Ilonka, Ingrid, Iona, Juniper, Jerica, Juno, Jocasta, Julianna, Joelle, Katya, Katinka, Karenza, Kenya, Leilani, London, Lyra, Larissa, Leonie, Meredith, Mallory, Miranda, Mackinley, Mackenna, Marissa, Marta, Mila, Mika, Malaika, Michalina, Nicolette, Nesta, Nia, Nyah, Nadia, Ottilie, Olwen, Piper, Peyton, Payson, Quinn, Romy, Romilly, Reese, Sasha, Samaris, Saskia, Star, Saffron, Sorrell, Sutton, Taryn, Trinity, Tulisa, Tonya, Toria, Ulrika, Vashti, Verity, Winona, Willa, Xanthe, Xenia, Yolanda, Yvette, Zillah, Zia.
Boys:
Alistair, Albion, Andre, Bear, Bram, Bowie, Boyd, Blair, Conan, Camden, Caven, Corin, Coben, Campbell, Denver, Deryn, Donte, Ellis, Eddison, Forest, Gareth, Greyson, Kirk, Kitt, Kirby, Lester, Lars, Leyland, Leroy, Morris, Murphy, Milan, Macauly, Quinlan, Red, Ryland, Reed, Rhylan, Ramsey, Roman, Saxon, Talon, Tavish, Tian, Tiernan, Trent, Warrick, Xaver, Yannick.