| Name | Gender | Meaning | Favorites |
| Obadiah | Boy | Serves God | |
| Obediah | Boy | Serves God | |
| Odeda | Girl | Strong | |
| Odede | Girl | Strong | |
| Ofira | Girl | Gold | |
| Ofra | Girl | Kid or Young goat | |
| Oma | Girl | Reverent | |
| Omar | Boy | Speaker, Ultimate devotee | |
| Omeet | Boy | My light | |
| Omet | Boy | My light | |
| Omette | Girl | Cedar tree | |
| Ona | Girl | Graceful | |
| Ophra | Girl | Young Fawn, Young Mountain | |
| Ophrah | Girl | Light | |
| Oprah | Girl | Runaway | |
| Ora | Girl | Light | |
| Orah | Girl | Light | |
| Oralee | Girl | Lord is my light | |
| Orali | Girl | The Lord is my Light | |
| Ori | Boy | My light | |
