| Name | M/F | Meaning |
|---|---|---|
| Oda-ingeborg | ![]() |
Meaning : Used in : German |
| Oddbjorg | ![]() |
Meaning : Used in : Norwegian |
| Oddlaug | ![]() |
Meaning : Used in : Norwegian |
| Oddnaug | ![]() |
Meaning : Used in : Norse |
| Oddveig | ![]() |
Meaning : Used in : Norse |
| Odtsetseg | ![]() |
Meaning : Star flower Used in : Buddhist |
| Oighrig | ![]() |
Meaning : Well Spoken. Used in : Greek, Greek |
| Olaug | ![]() |
Meaning : Used in : Norse |
| Oleg | ![]() |
Meaning : Used in : Australian, Chinese, Czechoslovakian, Danish, Finnish, French, German, Polish, Russian, Slavic, Swedish, Australian |
| Onanong | ![]() |
Meaning : Used in : Australian |
| Ong | ![]() |
Meaning : Used in : Australian |
| Ornanong | ![]() |
Meaning : Used in : Thai |
| Osburg | ![]() |
Meaning : Used in : German, Dutch |
| Othong | ![]() |
Meaning : Used in : Thai, Australian |
| Oung | ![]() |
Meaning : Used in : Australian |
| Ovog | ![]() |
Meaning : Used in : Zoroastrian |
| Oyunchimeg | ![]() |
Meaning : Wisdom ornament Used in : Buddhist |
| Oyuunchimeg | ![]() |
Meaning : Decorated or noble mind Used in : Buddhist |