| Name | Meaning | Details |
|---|---|---|
| Nimrod | Rebellion | View Details |
| Oakes | Dweller By The Oak Tree | View Details |
| Oakley | From The Oak Tree Field | View Details |
| Oleander | Evergreen Tree | View Details |
| Olive | Olive Or From The Olive Tree | View Details |
| Orinda | Pine Trees | View Details |
| Ornella | Flowering Ash Tree | View Details |
| Osceola | Black Drink Bellower | View Details |
| Owen | The Yew Tree Or Youth | View Details |
| Park | Cypress Tree | View Details |
| Peri | Dweller By The Pear-tree | View Details |
| Perry | Dweller By The Pear Tree | View Details |
| Pomona | Fruit Tree | View Details |
| Quanda | Slender Young Tree | View Details |
| Rei | Bell | View Details |