Baby boy names that start with the letter O, with meanings and origin. 50 names.
| Name | Meaning | Gender | Origin | Rashi |
|---|---|---|---|---|
| Oakley | Oak meadow | 👦 Boy | English | — |
| Obaid | Little servant (of God) | 👦 Boy | Arabic | — |
| Obi | Heart | 👦 Boy | Igbo | — |
| Obinna | Father's heart | 👦 Boy | Igbo | — |
| Ochieng | Born when the sun shines | 👦 Boy | Luo | — |
| Ochir | Vajra; Thunderbolt | 👦 Boy | Mongolian | — |
| Od | Star | 🧒 Unisex | Mongolian | — |
| Odhiambo | Born in the evening | 👦 Boy | Luo | — |
| Odysseas | Odysseus, the hero of the Odyssey | 👦 Boy | Greek | — |
| Ofa | Love (Tongan ʻOfa) | 🧒 Unisex | Samoan | — |
| Oğuz | The legendary ancestor of the Oghuz Turks | 👦 Boy | Turkish | — |
| Oisín | Little deer | 👦 Boy | Irish | — |
| Ojas | Vitality; Energy | 👦 Boy | Sanskrit, Marathi | Vrishabh |
| Ojasvi | Bright; Radiant | 👦 Boy | Sanskrit | Vrishabh |
| Ólafur | Ancestor's heir | 👦 Boy | Icelandic | — |
| Oleg | Holy; From Norse Helgi (Олег) | 👦 Boy | Norse | — |
| Oleh | Holy (Oleg) | 👦 Boy | Ukrainian | — |
| Oleksandr | Defender of people | 👦 Boy | Ukrainian | — |
| Oliver | Olive tree | 👦 Boy | International | — |
| Olivier | Olive tree | 👦 Boy | French | — |
| Olof | Ancestor's heir | 👦 Boy | Norse | — |
| Olumide | My God has come | 👦 Boy | Yoruba | — |
| Olusegun | God is victorious | 👦 Boy | Yoruba | — |
| Oluwaseun | We thank God | 👦 Boy | Yoruba | — |
| Oluwatobi | God is great | 🧒 Unisex | Yoruba | — |
| Om | The sacred syllable | 👦 Boy | Sanskrit | Vrishabh |
| Omar | Long-lived; Flourishing | 👦 Boy | Arabic | — |
| Ömer | Long-lived (Turkish form of Omar) | 👦 Boy | Turkish | — |
| Omesh | Lord of Om | 👦 Boy | Sanskrit | Vrishabh |
| Omid | Hope (امید) | 👦 Boy | Persian | — |
| Omkar | The sound of Om | 👦 Boy | Marathi | Vrishabh |
| Omondi | Born early in the morning | 👦 Boy | Luo | — |
| Omprakash | Light of Om | 👦 Boy | Sanskrit | Vrishabh |
| Ondřej | Manly (Andrew) | 👦 Boy | Czech | — |
| Onkar | The sacred sound Om | 👦 Boy | Sanskrit | Vrishabh |
| Onni | Luck; Happiness | 👦 Boy | Finnish | — |
| Onyango | Born late in the morning | 👦 Boy | Luo | — |
| Oriol | Golden; The oriole bird | 👦 Boy | Catalan | — |
| Orkhan | Great khan | 👦 Boy | Azerbaijani | — |
| Orry | After King Orry of Man | 👦 Boy | Manx | — |
| Oscar | Divine spear; Friend of deer | 👦 Boy | International | — |
| Oskar | Divine spear | 👦 Boy | Norse | — |
| Ostap | Steadfast (Eustathius) | 👦 Boy | Ukrainian | — |
| Otabek | Father-lord | 👦 Boy | Uzbek | — |
| Otieno | Born at night | 👦 Boy | Luo | — |
| Otto | Wealth; Prosperity | 👦 Boy | German | — |
| Ousmane | Uthman | 👦 Boy | West African | — |
| Owain | Well-born; Noble | 👦 Boy | Welsh | — |
| Owais | Little wolf; A devoted Yemeni saint | 👦 Boy | Arabic | — |
| Ozan | Bard; Poet | 👦 Boy | Turkish | — |