| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Ortega | [ɔ:'teigə] | |||
| ORTRUN | AWRT-roon | German | ||
| ORTWIN | AWRT-veen (German) | German, Ancient Germanic | ||
| ORTZI | - | Basque | ||
| Orval | ['ɔ:vəl] | |||
| ORVAL | AWR-vəl | English | ||
| ORVAR | - | Swedish, Norse Mythology | ||
| Orville | ['ɔ:vil] | |||
| ORVILLE | AWR-vil | English | ||
| ORVOKKI | OR-vok-kee | Finnish | ||
| OSAMA | - | Arabic | ||
| OSAMU | o-sah-moo | Japanese | ||
| OSANE | - | Basque | ||
| OSANNA | - | Italian (Rare) | ||
| OSANNE | - | French (Rare) |