Coral - not keen. No reason why.
Blossom - not keen. Just a bit too cutesy, I think.
Quinn - like it.
Amity - love it.
Ottilie - not keen. I don't think it makes a pleasant sound.
Juno - not keen. I keep seeing Jumbo (I know it's nothing like it really)
Astrid - love it.
Halle - like it.
Cassia - like it. Prefer Cassidy.
Delilah - not keen. Similar reasons to Ottilie.
I'd have a tough choice between Astrid and Amity. Maybe Amity because it's really unusual.
Other suggestions:
Aphra, Aria, Ariel, Averil, Bronte, Briar, Brynn, Casey, Cora, Cleo, Delphi, Dulcie, Effie, Erica, Elina, Faye, Fallon, Hebe, Hedda, Juniper, Kiki, Keltie, Livia, Leonie, Mika, Mila, Mala, Misty, Noa, Noelle, Nova, Piper, Romy, Rosina, Ramona, Rowena, Robina, Sadie, Saskia, Seren, Skye, Tansy, Tanya, Verity, Zeryn, Zia