| Name | Gender | Meaning | Favorites |
| Obelia | Girl | Needle | |
| Odele | Girl | Melody, Wealthy | |
| Odelia | Girl | I will praise god | |
| Odysseus | Boy | Full of wrath | |
| Ollie | Boy | From the name oliver | |
| Omega | Girl | Last | |
| Ophira | Girl | Gold | |
| Orion | Girl | A hunter in greek mythology | |
| Osanna | Girl | Praise | |
| Osias | Boy | Salvation | |
| Othello | Boy | Prosperous | |
| Otis | Boy | Hears Well | |
