I think they all go well with Jemima and love the first three. Less keen on Camille.
I know Jemimas with sisters called:
Florence
Daisy
Camilla
Josephina
Genevieve
Charlotte
Rebecca (though think that's a bit of an unfortunate pair - quack quack!)
Alternatively:
Arabella, Amelia, Alicia, Alexandra, Aurora, Bryony, Beatrice, Bethany, Clarissa, Cassandra, Cordelia, Constance, Delilah, Dorothy, Daphne, Elizabeth, Erica, Esther, Evangeline, Francesca, Felicity, Georgina, Gabriella, Hannah, Hermione, Harmony, Harriet, Henrietta, Hester, Isabelle, Isabella, Imogen, Joanna, Juliette, Katherine, Lucinda, Lydia, Larissa, Leona, Lorelai, Lavinia, Leandra, Melissa, Miranda, Madeleine, Miriam, Margaret, Marianna, Natasha, Natalie, Natalia, Naomi, Olivia, Ophelia, Philippa, Penelope, Rosalie, Rosanna, Rosemary, Serena, Saskia, Sabrina, Sophia, Samantha, Stephanie, Sorrell, Tabitha, Tallulah, Victoria, Vanessa, Violet, Vivienne, Veronica, Xanthe, Zara