With [name_f]Freya[/name_f], I really like:
[name_f]Sunniva[/name_f] - magical but with familiar sounds
[name_f]Aurora[/name_f] - celestial but familiar and strong
[name_f]Eden[/name_f] - pretty but not fussy, with sparkle to it.
[name_f]Eden[/name_f] [name_f]Georgia[/name_f] would be nice 
A few other ideas:
[name_f]Lina[/name_f]
[name_f]Lilias[/name_f]
[name_f]Juniper[/name_f]
[name_f]Juno[/name_f]
[name_f]Genevieve[/name_f]
[name_f]Indigo[/name_f]
[name_f]Tallulah[/name_f]
[name_f]Willow[/name_f]
[name_f]Melody[/name_f]