| Gender | Baby Name | Meaning |
|---|---|---|
 | Octavian | Eighth |
| Octavio | Eighth |
| Oda | Great field |
 | Odeda | To encourage |
| Odelia | Thank God |
| Odina | Divine creative inspiration |
| Odo | Rich, wealthy |
| Ofek | Horizon |
| Ofer | Fawn |
| Odin | Frenzy, Inspiration |
| Ofira | Gold |
| Ogden | From the oak valley |
| Ogima | Chief |
| Oisin | Deer |
| Oistin | Venerable |
| Okena | Water chief |
| Oke | Deer lover |
| Okoth | Born when it was Raining |
| Oksana | Praise God |
