| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Obed | O-bed (English) | Biblical, Biblical Latin, Biblical Greek | ||
| Onesimos | - | Ancient Greek, Biblical Greek | ||
| Onesiphoros | - | Ancient Greek, Biblical Greek | ||
| Osee | - | Biblical Latin, Biblical Greek | ||
| Ourbanos | - | Biblical Greek | ||
| Ouri | - | Biblical Greek | ||
| Ourias | - | Biblical Greek | ||
| Ozazias | - | Biblical Greek | ||
| Ozi | - | Biblical Latin, Biblical Greek | ||
| Ozias | - | Biblical Latin, Biblical Greek | ||
| Oziel | - | Biblical Greek |