| Name | Meaning | Details |
|---|---|---|
| Oda | Great Field | View Details |
| Odell | From The Woad Hill | View Details |
| Ogden | From The Oak Valley | View Details |
| Oihane | From The Forest | View Details |
| Olive | Olive Or From The Olive Tree | View Details |
| Oluina | From The Family Of My Mother | View Details |
| Onika | Who Is Greater Than God? | View Details |
| Onyekachukwu | Who Is Greater Than God? | View Details |
| Orah | From Ora. | View Details |
| Orenda | Great Spirit | View Details |
| Orhan | Great Leader | View Details |
| Orlando | From Glorious Land | View Details |
| Orozco | From Orozco | View Details |
| Ortega | From Ortega | View Details |
| Overton | From The Riverbank Town | View Details |