I don't think you should go too unusual because Amelia is (or was, idk?) number 1 so if you had number 500 or something it would seem strange. Although I guess it wouldn't matter after childhood.
How about:
Bryony, Bethany, Charlotte, Chloe, Eleanor, Evelyn, Emily, Florence, Georgia, Hannah, Harriet, Isabel, Imogen, Jessica, Jasmine, Katie, Kathryn, Lily, Lucy, Layla, Madeleine, Matilda, Olivia, Phoebe, Ruby, Rosie, Sophie, Sophia, Victoria