| Gender | Baby Name | Meaning |
|---|---|---|
 | Nora | Honor |
| Norah | Honor |
 | Norris | From the North |
| Noura | Light |
| Noya | Beauty |
| Nuha | Intelligence |
| Nura | Light |
| Nydia | A safe place |
| Nyx | Night |
| Obama | Slightly bent |
| Odele | Wealth |
| Odetta | Wealth |
| Odette | Wealth |
| Odile | Wealthy |
| Olathe | Lovely, Beautiful |
| Oleta | Truth |
| Olga | Holy |
| Oliva | Olive |
| Olivia | Olive tree |
| Olympe | Olympian |
| Olympia | Mountain of the Gods |
| Opal | Precious gem |
| Ophira | Gold |
| Ora | Gold |
| Orella | Golden |
| Orenda | Great Spirit |
| Oriana | Golden |
| Orinda | Pine tree |
| Orlena | Golden |
| Orpah | Fawn |
