| Baby Name | Meaning | Gender |
|---|
| Olga | Holy | Female |
| Oliana | Oleander | Female |
| Olinda | Defender Of The Land | Female |
| Olivia | Olive Tree | Female |
| Olympia | From Olympus | Female |
| Omar | First Son; Long Life; Most High; The Prophet's Follower | Male |
| Ona | Graceful | Female |
| Oni | West African Name Meaning "Desired." Also A Yoruba Of Nigeria Name Meaning "Born In A Sacred Location." | Female |
| Onida | The One Searched For | Female |
| Ophelia | Serpentine | Female |
| Oprah | Fawn | Female |
| Oralie | Golden | Female |
| Orane | Rising | Female |
| Oren | Tree | Male |
| Orenda | Iroquois Name Meaning "Magic Power." | Female |
| Oriana | Blond | Female |
| Orianna | Sunrise | Female |
| Oriel | Bird | Female |
| Orlando | Renowned In The Land. Form Of Roland. | Male |
| Orlena | Gold | Female |
| Oswald | Power Of God | Male |
| Otto | Born Eighth | Male |
| Paige | Attendant | Female |
| Pakuna | Miwok Name Meaning " Deer Jumping Downhill." | Female |
| Paloma | Dove | Female |