I once knew a family called Elliot. Their children will be adults/nearly adults now but the girls were:
Sophie
Rebecca
Grace
I think Ada and Elsie are both fine with Elliot but agree that perhaps a consonant at the start and end might work better. How about:
Bethan, Bronwen, Carys, Celeste, Faith, Hazel, Jennifer, Jasmine, Kathryn, Lois, Mabel, Meredith, Megan, Nicole, Paige, Pearl, Quinn, Rachel, Robyn, Rowan, Raven, Summer, Scarlett, Seren, Shannon, Skylar, Samaris, Tamsin, Taryn, Tegan, Yasmin.