Starting with letter O
| # | Name | Origin | Meaning | Gender | |
|---|---|---|---|---|---|
| 321 | Osgood | Norse | A divine Goth. | M | |
| 322 | Osgood | Teutonic | Divine creator. | M | |
| 323 | Oshea | Biblical | A savior; a deliverer | M | |
| 324 | Osip | Hebrew | God wiIl multiply. | M | |
| 325 | Osip | Ukrainian | Ukrainian form of Joseph 'God shall add'. | M | |
| 326 | Osiris | Egyptian | God of the dead. | M | |
| 327 | Oskar | Celtic | Jumping fighter. | M | |
| 328 | Oskar | Norse | Divine spear. | M | |
| 329 | Oskar | Scandinavian | God's spear. | M | |
| 330 | Oskar | Swedish | Leaping warrior. | M | |
| 331 | Oskari | Finnish | Leaping warrior. | M | |
| 332 | Osker | Celtic | Jumping fighter. | M | |
| 333 | Osman | English | Godly protection. | M | |
| 334 | Osman | Scandinavian | Godly protection. | M | |
| 335 | Osmar | English | Divinely glorious. | M | |
| 336 | Osmarr | English | Divinely glorious. | M | |
| 337 | Osmin | English | Godly protection. | M | |
| 338 | Osmin | Scandinavian | Godly protection. | M | |
| 339 | Osmond | English | Divine protector. | M | |
| 340 | Osmond | Scandinavian | Godly protection. | M | |