Name | Meaning |
| Oaken | made of oakwood |
| Oakley | oak field |
| Obadiah | servant of God |
| Obalesh | Shiva |
| Obaleshwar | Shiva |
| Oban | courageous |
| Oberron | beautiful |
| Obuli | a hindu god |
| Occa | who protects motherland |
| Oceana | ocean |
| Oceanus | beauty of ocean |
| Oded | first son |
Name | Meaning |
| Odeda | strong |
| Odelia | affulent |
| Odera | gold |
| Odetta | affulence |
| Oditi | dawn |
| Odom | ground |
| Ofer | Fawn. Young one of deer |
| Ofir | abundance |
| Ofira | abundance |
| Ogla | son of joy |
| Ogle | son of joy |
| Ojas | glow |
| Ojasvi | bright |
| Ojaswini | bright |
Name | Meaning |
| Olaf | ancestral |
| Oliver | olive tree |
| Olivia | symbol of peace |
| Om | sacred syllable of Hindus |
| Oma | source of life |
| Omaja | outcome of spiritual unity |
| Omar | first son |
| Omisha | goddess of birth and death |
| Omja | outcome of spiritual unity |
| Omkar | God |
| Omkesh | divine |
| Omnidhi | divine fortune |
Name | Meaning |
| Ondrej | warrior |
| Oneil | descendant |
| Oni | protective cover |
| Opal | jewel |
| Opaline | jewel |
| Oparna | goddess Parvati |
| Ophelia | helpful person |
| Ophir | honest |
| Ophira | riches |
| Oprah | God is light |
| Ora | glow |
| Oran | ring of light |
Name | Meaning |
| Ordmaer | high rank person |
| Orion | son of fire |
| Orla | golden princess |
| Orland | Famous place |
| Orlando | Famous place |
| Orli | enlightened |
| Orlik | God is light |
| Oron | joy |
| Orped | brave and adventurous. |
| Orran | river name |
| Orson | Like a bear |
| Orton | town on the seashore |
Name | Meaning |
| Orva | courageous partner |
| Orville | golden place |
| Osama | like a lion |
| Osaze | favoured by God |
| Osbert | enlightened |
| Osborn | warrior of God |
| Oscar | divine spear |
| Osher | joy |
| Oshin | flower |
| Oshma | summer |
| Osiris | powerful eyesight |
| Osma | divine warrior |
Name | Meaning |
| Osmar | divine |
| Osmond | divine warrior |
| Osnat | divine |
| Osric | divine king |
| Ossama | lion |
| Oswald | divine power |
| Oswin | divine friend |
| Othelia | affulence |
| Othello | affulent |
| Otis | who has healthy ears |
| Otniel | power of God |
| Ottilie | affulence |
Name | Meaning |
| Ottis | affulent son of king Otto |
| Otto | affulence |
| Otto | a saint king |
| Ovadia | servant of God |
| Ovia | egg |
| Oviya | artist |
| Oviyan | artist |
| Owen | young warrior |
| Oxley | ox meadow |
| Oxton | ox town |
| Oz | strength |