Pretty is of course completely subjective but names I think are pretty include:
Amberley, Anoushka, Abigail, Alyona, Anastasia, Anika, Ariel, Averil, Aaliyah, Amabelle, Amaya, Ava, Alaska, Avery, Aubrey, Ailsa
Belinda, Bluebelle, Bronte
Calliope, Cassandra, Cassia, Calista, Charlotte, Christabel, Cherry, Camilla
Danica, Daniella
Elisaveta, Evangeline, Ebony, Erica, Everley, Etta, Effie, Elektra, Ekaterina, Elina, Eva, Eilidh
Francesca, Felicity, Fenella, Faith
Gabriella, Georgina, Genevieve, Giselle, Grace
Hannah, Hermione, Hallie
Isabelle, Isabella, India, Ivy, Iris, Isla, Isolde
Joanna, Jessica, Juliette, Jemima, Juniper
Keziah, Katrina
Leonie, Larissa, Lorelai, Livia, Lara
Miranda, Mirabelle, Marissa, Melissa, Madeleine, Mila, Mika, Mala
Naomi, Natalia, Natasha, Nova
Octavia, Olivia
Phoebe, Pippa, Pippi
Rhiannon, Rebecca, Robyn, Rosanna, Rosalie
Sophie, Sophia, Samantha, Stephanie, Skye, Susannah, Sadie, Sephora
Tamara, Thalia, Thea
Victoria, Vanessa, Verity
Xanthe, Xanthippe
Zara, Zeryn