Are they all that popular? I know loads of Isabellas, a couple of Evelyns and one Florence but no Siennas or Madisons.
I love Isabella and Madison
I like Evelyn and Sienna
Florence is okay.
Not sure about other suggestions as your current list is quite diverse. Um ...
Imogen and:
Abigail, Alice, Alexandra, Annabelle, Alexis, Amber, Bethany, Bronte, Bryony, Charlotte, Chloe, Cassidy, Caitlin, Daisy, Darcey, Emily, Eloise, Elodie, Erin, Eden, Erica, Effie, Frances, Francesca, Felicity, Grace, Giselle, Gabriella, Genevieve, Hannah, Hayley, Holly, Hope, Jessica, Joanna, Juliette, Jasmine, Kathryn, Katie, Kayla, Kayleigh, Lara, Layla, Lyra, Lydia, Larissa, Lacey, Mackenzie, Madeleine, Matilda, Miranda, Melissa, Martha, Maisie, Molly, Millie, Miriam, Natalie, Natasha, Nicole, Nadia, Niamh, Nyah, Olivia, Phoebe, Philippa, Piper, Poppy, Rebecca, Ruby, Rosie, Rhiannon, Sadie, Serena, Sabrina, Saskia, Savannah, Sorrel, Saffron, Sylvia, Susannah, Tegan, Tamsin, Tamara, Tabitha, Taylor, Verity, Vanessa, Victoria, Vivienne, Willow, Xanthe, Yasmin, Zoe, Zara