[name_f]Rhiannon[/name_f] is lovely :heart but alas - some other ideas could be:
[name_f]Noemi[/name_f]
[name_f]Leona[/name_f]
[name_f]Edith[/name_f]
[name_f]Adara[/name_f]
[name_f]Alma[/name_f]
[name_f]Ramona[/name_f]
[name_f]Marianne[/name_f]
[name_f]Rosalind[/name_f]
[name_f]Tamsin[/name_f]