| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Obed | O-bed (English) | Biblical, Biblical Latin, Biblical Greek | ||
| Onesimus | o-NES-i-məs (English) | Biblical, Biblical Latin | ||
| Onesiphorus | - | Biblical, Biblical Latin | ||
| Osee | - | Biblical Latin, Biblical Greek | ||
| Ozi | - | Biblical Latin, Biblical Greek | ||
| Ozias | - | Biblical Latin, Biblical Greek | ||
| Ozihel | - | Biblical Latin |