I think I would choose Sylvie..Or [name_f]Sylvia[/name_f] as a full name. [name_f]She[/name_f] fits the whimsy of these three girls and the meaning feels perfect too! To give them middles, I’d go with a set of:
[name_f]Elowyn[/name_f] [name_f]Marnie[/name_f], [name_f]Kindred[/name_f] [name_f]Althea[/name_f], [name_f]Valley[/name_f] [name_f]Frances[/name_f] & [name_f]Sylvia[/name_f] [name_f]Juniper[/name_f] 