| Name | Meaning | Details |
|---|---|---|
| Ondrea | Manly | View Details |
| Oorjita | Powerful Woman | View Details |
| Orah | From Ora. | View Details |
| Orlando | From Glorious Land | View Details |
| Orozco | From Orozco | View Details |
| Ortega | From Ortega | View Details |
| Outacite | Man Killer | View Details |
| Overton | From The Riverbank Town | View Details |
| Oxford | From The Oak Valley | View Details |
| Ozanka | Wall Germander Flower | View Details |
| Pacey | From Pacy In France | View Details |
| Pacorro | Free Man | View Details |
| Padraic | Nobleman | View Details |
| Pahkakino | Good Man | View Details |
| Palani | Free Man | View Details |