From my list:
[name_f][/name_f][name_f]Opal[/name_f]
[name_f][/name_f][name_m]Orchard[/name_m]
[name_f][/name_f]Órnait
[name_f][/name_f][name_f]Oksana[/name_f]
[name_f][/name_f]Oscalie
[name_f][/name_f][name_f]Ombeline[/name_f]
[name_f][/name_f]Omphale
[name_f][/name_f][name_f]October[/name_f]
[name_f][/name_f][name_f]Odelia[/name_f]
[name_f][/name_f][name_f]Odette[/name_f]
[name_f][/name_f][name_f]Olga[/name_f]
[name_f][/name_f][name_f]Olwen[/name_f]
[name_f][/name_f][name_f]Ondine[/name_f]
[name_f][/name_f][name_f]Ostara[/name_f]
[name_f][/name_f][name_f]Onnolee[/name_f]
[name_f][/name_f][name_m]Ornette[/name_m]
[name_f][/name_f][name_f]Orla[/name_f]