Starting with letter O
| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 261 | Ormemund | English | Spear defender. | M | |
| 262 | Ormod | Anglo-Saxon | Sad. | M | |
| 263 | Ormond | English | Spear defender. | M | |
| 264 | Ormond | Teutonic | Mariner. | M | |
| 265 | Ormund | English | Spear defender. | M | |
| 266 | Ornan | Biblical | That rejoices. | M | |
| 267 | Oro | Spanish | Gold. | M | |
| 268 | Orpheus | Greek | Son of Apollo. | M | |
| 269 | Orran | English | The name of an English river. | M | |
| 270 | Orran | Gaelic | Pale. | M | |
| 271 | Orrel | Russian | Eagle. | M | |
| 272 | Orrel | Slavic | Eagle. | M | |
| 273 | Orren | English | The name of an English river. | M | |
| 274 | Orren | Gaelic | Pale. | M | |
| 275 | Orrick | English | From the ancient oak tree. | M | |
| 276 | Orrik | English | From the ancient oak tree. | M | |
| 277 | Orrin | English | The name of an English river. | M | |
| 278 | Orrin | Gaelic | Pale. | M | |
| 279 | Orsen | English | Ormond's son. | M | |
| 280 | Orsino | Italian | Little bear. | M | |