| Name | Meaning | Details |
|---|---|---|
| Orlando | From Glorious Land | View Details |
| Ormand | Descendent Of The Red One | View Details |
| Ormanda | Descendent Of The Red One | View Details |
| Ornice | Combination Of Ornella And Janice | View Details |
| Orozco | From Orozco | View Details |
| Ortega | From Ortega | View Details |
| Ortiz | Son Of Orti | View Details |
| Osama | Lion-Like | View Details |
| Oscosh | The Bravest Of All | View Details |
| Osias | Salvation | View Details |
| Osiris | God Of The Dead | View Details |
| Othniel | Strength/Lion Of God | View Details |
| Overton | From The Riverbank Town | View Details |
| Owen | The Yew Tree Or Youth | View Details |
| Oxford | From The Oak Valley | View Details |