| Name | Meaning | Details |
|---|---|---|
| Omeo | Mountains | View Details |
| Onni | Happiness; Luck | View Details |
| Ontibile | God Is Watching Over Me | View Details |
| Onufry | Grazing Donkey | View Details |
| Ooyu | Rainbow | View Details |
| Orane | Rising | View Details |
| Orchid | Flowering Plant | View Details |
| Orde | Point | View Details |
| Oren | Jerusalem Pine | View Details |
| Orestes | Mountain Dweller | View Details |
| Orinda | Pine Trees | View Details |
| Orion | Mountain Dweller | View Details |
| Orna | Pine | View Details |
| Ornella | Flowering Ash Tree | View Details |
| Ornice | Combination Of Ornella And Janice | View Details |