If you are going down the 3 syllables starting with a vowel route:
Amelia, Arabella, Athena, Amelie, Amaya, Amara, Aurora, Aurelia, Ariella, Abigail, Ariana, Anastasia, Alana, Ayesha, Alaya/Alayah/Alaia, Alayna, Alora, Aleena/Alina, Adeline/Adaline, Alyssa, Alara, Addison, Allegra, Adelaide
Elodie, Elizabeth, Eliza, Eleanor, Eliana, Elena/Elina, Elisa, Emmeline, Evelina, Elara, Erica, Eliora, Elaia, Elowen
Isabella/Isabelle/Isobel, Imogen, Inaya/Inayah, India, Inara, Indigo, Imani, Isadora, Ilaria, Ioana
Olivia, Ottilie, Ophelia, Olympia, Olaedo, Otilia, Oceana, Olanna, Ohana
Ursula, Uriel, Uriella/Uriela, Umayrah, Urenna