Guinevere
Geneva
Ginevra
Arwen
Olwyn
Eowen
Anwen
Rowan
Aspen
Meadow
Willow
Iris
Ivy
Jade
Wisteria
Lunaria
Sequoia
Cypress
Riviera
Rosalind
Rosemary
Athena
Artemis
Artemisia
Thora
Frigga
Sif
I think of Shrek and Burn Notice for Fiona but what about Fiora, Flora, or Fauna?
You can name her Juniper and occasionally call her June for short
I love all of your names!! I really think [name_u]Juniper[/name_u] and [name_f]Jane[/name_f] sound lovely as a sibset fyi, but I think my favorites are [name_f]Magnolia[/name_f] (nn maisie), [name_f]Jane[/name_f], and [name_u]Juniper[/name_u]. [name_f]Phoebe[/name_f] is super cute as well, reminds me of [name_u]Lisa[/name_u] Kudrow’s character in “Friends” , but while fiona is beautiful, I cant get over “Shrek” … hopefully that will die out with future generations lol. Good luck!
[name_f]Flora[/name_f]! 
[name_f]Magnolia[/name_f] is so so pretty! I personally absolutely love this name, and the nicknames [name_u]Noli[/name_u] and [name_f]Lia[/name_f] are really pretty and usable! I also really think [name_u]Juniper[/name_u] is very cute.