| Name | Meaning | Details |
|---|---|---|
| Oren | Jerusalem Pine | View Details |
| Orenda | Great Spirit | View Details |
| Orestes | Mountain Dweller | View Details |
| Orinda | Pine Trees | View Details |
| Orion | Mountain Dweller | View Details |
| Orlando | From Glorious Land | View Details |
| Orna | Pine | View Details |
| Ornella | Flowering Ash Tree | View Details |
| Ornice | Combination Of Ornella And Janice | View Details |
| Orpheus | Unknown Meaning | View Details |
| Orwa | Trouble During Pregnancy | View Details |
| Osamu | Discipline | View Details |
| Osbert | God Bright | View Details |
| Osceola | Black Drink Bellower | View Details |
| Osher | Happiness | View Details |