| Name | Meaning | Favorites |
| Oakley | Field of oak trees | |
| Obelia | Needle | |
| Octavia | Eighth | |
| Odathi | Refreshing | |
| Odeda | Strong | |
| Odede | Strong | |
| Odele | Melody, Wealthy | |
| Odelia | I will praise god | |
| Odell | Otter | |
| Odetta | Ode | |
| Odette | Melody | |
| Oditi | Dawn | |
| Odoti | Dawn, Refreshing | |
| Ofira | Gold | |
| Ofra | Kid or Young goat | |
| Ohanna | God's Gracious Gift | |
| Ohelah | Tent | |
| Oindrila | Another Name for the Wife of Indra | |
| Oja | Vitality | |
| Ojasvi | Bright | |
