| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| Oria | - | Italian | ||
| Oriana | o-RYAH-nah | Italian | ||
| Origenes | - | Ancient Greek | ||
| Oriol | - | Catalan | ||
| Orla (2) | - | Danish | ||
| Orlanda | or-LAHN-dah | Italian | ||
| Orlando | or-LAHN-do | Italian | ||
| Ormazd | OR-mazd | Persian Mythology | ||
| Ornella | - | Italian | ||
| Orsina | - | Italian | ||
| Orsino | - | Italian | ||
| Orso | - | Italian | ||
| Orsola | OR-so-lah | Italian | ||
| Orsolya | - | Hungarian | ||
| Ortrun | AWRT-roon | German |