| Name | M/F | Meaning |
|---|---|---|
| Odette | ![]() |
Meaning : Water Lady, Small Butterfly Used in : French, German, Greek, Portuguese, Anglo, Australian, Danish, Dutch |
| Ofelia | ![]() |
Meaning : Help Used in : French, Greek, Italian, Latin, Portuguese, American, Australian, Danish |
| Olalla | ![]() |
Meaning : Well-Born Used in : Portuguese, Basque |
| Olga | ![]() |
Meaning : Holy Used in : Finnish, French, German, Greek, Italian, Norse, Polish, Portuguese, Romanian, Russian, Scandinavian, Slavic, Slovenian, Swedish, Teutonic, American, Australian, Chinese, Czechoslovakian, Danish, Dutch |
| Olivia | ![]() |
Meaning : Olive Tree Used in : Australian, English, Finnish, French, German, Greek, Jamaican, Italian, Latin, Portuguese, Romanian, Shakespearean, Spanish, Swedish, American, Australian, Chinese, British, Danish, Dutch |
| Oriana | ![]() |
Meaning : Sun Ray, Shining Light Used in : English, French, Greek, Italian, Latin, Portuguese, Australian, British |
| Otilia | ![]() |
Meaning : Acute Hearing Used in : French, German, Latin, Portuguese, Australian, Danish |