| Name | Gender | Pronounced | Usage | Popularity |
|---|---|---|---|---|
| OPHIR | - | Biblical | ||
| OPHIUCHUS | - | Astronomy | ||
| OPHRAH | AWF-rə (English) | Biblical | ||
| OPRAH | O-prə (English) | Various | ||
| OR | - | Hebrew | ||
| ORA (1) | - | English | ||
| ORA (2) | - | Hebrew | ||
| ORABELA | o-rah-BE-lah | Esperanto | ||
| ORAH | - | Hebrew | ||
| ORAL | - | English (Rare) | ||
| ORALEE | - | English (Rare) | ||
| ORALIE | - | English (Rare) | ||
| ORAN | O-ran | Irish | ||
| ORAZIO | - | Italian | ||
| ORBÁN | - | Hungarian |