I love [name_f]Willow[/name_f] & [name_f]Isla[/name_f] together!
[name_f]Camilla[/name_f] is very pretty, and I also suggest [name_f]Camille[/name_f].
Other ideas:
[name_f]Mallory[/name_f], [name_f]Jade[/name_f], [name_f]Belle[/name_f], [name_u]Eden[/name_u], [name_u]Brooke[/name_u], [name_f]Savanna[/name_f]
[name_f]Willow[/name_f] and:
[name_u]Artemis[/name_u]
[name_f]Autumn[/name_f]
[name_u]Demeter[/name_u]
[name_f]Fleur[/name_f]
[name_f]Hazel[/name_f]
[name_f]Hestia[/name_f]
[name_f]Ivy[/name_f]
[name_u]Juniper[/name_u]
[name_f]Linnea[/name_f]
[name_f]Luna[/name_f]
[name_f]Nova[/name_f]
[name_f]Poppy[/name_f]
[name_u]Rain[/name_u]
[name_f]Rosemary[/name_f]
[name_u]Sage[/name_u]
[name_f]Soleil[/name_f]
Best wishes!