List of baby names.
Advanced search| Name | Gender | Origin/Nationality | Name Meaning |
| Orlando | Boy | Italian, Spanish, German, Latin | Famous land |
| Orman | Boy | English | Spear man |
| Ormond | Boy | English | Spear man |
| Ornella | Girl | Italian | A flowering Ash tree.? |
| Orson | Boy | English, Latin | Son of spear man |
| Orvin | Boy | English | Friend of the spear |
| Orvin | Girl | English | Friend of the spear |
| Osama | Boy | Muslim, Arabic | Lion |
| Osbert | Boy | English | Bright, divine |
| Oscar | Boy | Celtic, Gaelic | Lover of the deer |
| Osmond | Boy | English | Divine protector, God protector |
| Osric | Boy | English | Divine ruler |
| Oswald | Boy | English | God of the forest |
| Oswin | Boy | English | Friend of God |
| Otello | Boy | Italian | Weath, prosperous |
| Ottavia | Girl | Italian, Latin | Eighth |