| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Ouri | - | Biblical Greek | ||
| Ourias | - | Biblical Greek | ||
| 'Ovadyah | - | Biblical Hebrew | ||
| Oved | - | Hebrew, Biblical Hebrew | ||
| Ovidius | - | Ancient Roman | ||
| Owain | O-wien (Welsh, Welsh Mythology) | Welsh, Welsh Mythology, Arthurian Romance | ||
| Oyibo | - | Western African, Urhobo | ||
| Ozazias | - | Biblical Greek | ||
| Ozi | - | Biblical Latin, Biblical Greek | ||
| Ozias | - | Biblical Latin, Biblical Greek | ||
| Oziel | - | Biblical Greek | ||
| Ozihel | - | Biblical Latin | ||
| PŘEmek | - | Czech | ||
| PŘEmysl | - | Czech | ||
| PÁLa | POW-lah | Icelandic |