[name_f]Lucy[/name_f] [name_f]Soleil[/name_f] is bright and sunny – lovely name!
[name_f]Heidi[/name_f] is great too 
[name_f]Sonia[/name_f] is unexpected and distinctive and [name_f]Anna[/name_f] feels very versatile
I’d probably cut [name_f]Ava[/name_f] and [name_f]Lily[/name_f] if you don’t want popular though
Some other ideas…
[name_f]Mirabel[/name_f]
[name_f]Anya[/name_f]
[name_f]Freya[/name_f]
[name_f]Nadia[/name_f]
[name_f]Annabel[/name_f]
[name_f]Luanne[/name_f] / [name_f]Luanna[/name_f]
[name_f]Stella[/name_f]