| Name | Meaning | Favorites |
| Ossama | One of the names of the lion | |
| Osvaldo | God power | |
| Oswald | Of God-Like Power | |
| Osya | God will add | |
| Othello | Prosperous | |
| Otis | Hears Well | |
| Ottakoothan | Poet | |
| Ottmar | A form of Osman | |
| Otto | Wealthy | |
| Ovadiah | Servant of God | |
| Ovadya | Serves God | |
| Ovidio | Shepherd | |
| Oviyan | Artist | |
| Owen | Born to nobility | |
| Ozturk | Pure | |
| Pabok | Fire | |
| Padmabandhu | Friend of Lotus | |
| Padmahasta | Lotus Handed | |
| Padmaj | Lord Brahama | |
| Padmakumar | Derived from Padmaprabhu | |
