| Name | Meaning | Details |
|---|---|---|
| Oliana | My God Has Answered | View Details |
| Olimpio | Mountain Of The Gods | View Details |
| Olive | Olive Or From The Olive Tree | View Details |
| Oluina | From The Family Of My Mother | View Details |
| Olujimi | God Gave Me This | View Details |
| Olympia | Mountain Of The Gods | View Details |
| Onika | Who Is Greater Than God? | View Details |
| Ontibile | God Is Watching Over Me | View Details |
| Onyekachukwu | Who Is Greater Than God? | View Details |
| Orah | From Ora. | View Details |
| Orlando | From Glorious Land | View Details |
| Orozco | From Orozco | View Details |
| Ortega | From Ortega | View Details |
| Osbert | God Bright | View Details |
| Osborn | God Bear | View Details |