Search boys Baby Names starting with letter O
| # | Name | Origin | Meaning | Gender | Save |
| 401 | Ottah | Egyptian | Third born. | M |  |
| 402 | Ottar | Norse | Fighter. | M | |
| 403 | Ottavio | Latin | Born eighth. | M | |
| 404 | Otto | German | Born eighth or wealthy. | M | |
| 405 | Otto | Swedish | Wealthy. | M | |
| 406 | Otto | Teutonic | Wealthy. | M | |
| 407 | Ottokar | German | Happy fighter. | M | |
| 408 | Ottoway | Teutonic | Lucky in war. | M | |
| 409 | Otus | Greek | Keen of hearing. | M | |
| 410 | Otway | Teutonic | Lucky in war. | M | |
| 411 | Oubastet | Egyptian | A cat. | M | |
| 412 | Ouray | NativeAmerican | Arrow. | M | |
| 413 | Ourson | French | Little bear. | M | |
| 414 | Outram | Teutonic | Wealthy raven. | M | |
| 415 | Ovadiah | Hebrew | Serves God. | M | |
| 416 | Ovadya | Hebrew | Serves God. | M | |
| 417 | Ovaegir | Norse | Father of the Skraeling children. | M | |
| 418 | Ove | Norse | Ancestors. | M | |
| 419 | Ove | Swedish | Egg. | M | |
| 420 | Oved | Hebrew | Worker. | M | |
| 421 | Ovid | Hebrew | Worker. | M | |
| 422 | Ovid | Latin | Name of a poet. | M | |
| 423 | Owain | ArthurianLegend | Son of Urien. | M | |
| 424 | Owain | English | Variant of Ewen: Variant of Eoghan or Eugene. | M | |
| 425 | Owain | Greek | Variant of Eugene: Well-born. Famous bearer: Prince Eugene of Savoy; American playwright Eugene O'Neill. | M | |
| 426 | Owain | Welsh | Young warrior. | M | |
| 427 | Owein | Welsh | Young warrior. | M | |
| 428 | Owen | Celtic | Young fighter. | M | |
| 429 | Owen | English | Variant of Ewen: Variant of Eoghan or Eugene. | M | |
| 430 | Owen | Greek | Variant of Eugene: Well-born. Famous bearer: Prince Eugene of Savoy. | M | |
| 431 | Owen | Welsh | Young warrior. Also can be a variant of Eugene: Well-born. | M | |
| 432 | Owin | Celtic | Young fighter. | M | |
| 433 | Owin | Welsh | Young warrior. | M | |
| 434 | Owyn | Celtic | Young fighter. | M | |
| 435 | Owyn | Welsh | Young warrior. | M | |
| 436 | Owynn | Welsh | Wellborn. Form of Ewan. | M | |
| 437 | Oxa | Anglo-Saxon | Ox. | M | |
| 438 | Oxford | English | From the ox ford. | M | |
| 439 | Oxford | Shakespearean | 'King Henry the Sixth, Part III' Earl of Oxford. 'King Richard III' Earl of Oxford. | M | |
| 440 | Oxley | English | From the ox enclosure. | M | |
| 441 | Oxnaford | English | From the ox ford. | M | |
| 442 | Oxnaleah | English | From the ox enclosure. | M | |
| 443 | Oxnatun | English | From the ox farm. | M | |
| 444 | Oxton | English | From the ox farm. | M | |
| 445 | Oysten | Norse | Happy. | M | |
| 446 | Oz | English | Divine. | M | |
| 447 | Ozem | Biblical | That fasts, their eagerness. | M | |
| 448 | Ozi | Hebrew | Strong. | M | |
| 449 | Ozias | Biblical | Strength from the Lord | M | |
| 450 | Ozni | Biblical | An ear, my hearkening. | M | |