| Name | Meaning | Gender | Origin | Rashi |
|---|---|---|---|---|
| Oakley | Oak meadow | 👦 Boy | English | — |
| Oana | God is gracious (Joan) | 👧 Girl | Romanian | — |
| Obaapa | Good woman | 👧 Girl | Akan | — |
| Obada | Worship (Ubadah) | 👦 Boy | Arabic | — |
| Obaid | Little servant (of God) | 👦 Boy | Arabic | — |
| Obaida | Little servant; After Abu Ubayda | 👦 Boy | Arabic | — |
| Obakeng | Praise him (God) | 👦 Boy | Tswana | — |
| Obed | Servant (of God) | 👦 Boy | Hebrew | — |
| Obi | Heart | 👦 Boy | Igbo | — |
| Obiageli | One who has come to enjoy | 👧 Girl | Igbo | — |
| Obianuju | Born in the midst of plenty | 👧 Girl | Igbo | — |
| Obinna | Father's heart | 👦 Boy | Igbo | — |
| Obiora | Heart of the people | 👦 Boy | Igbo | — |
| Océane | Ocean | 👧 Girl | French | — |
| Ochieng | Born when the sun shines | 👦 Boy | Luo | — |
| Ochir | Vajra; Thunderbolt | 👦 Boy | Mongolian | — |
| Octavio | Eighth | 👦 Boy | Spanish | — |
| Od | Star | 🧒 Unisex | Mongolian | — |
| Odai | Runner; Swift | 👦 Boy | Arabic | — |
| Odair | Wealthy; Prosperous | 👦 Boy | Portuguese | — |
| Odalis | Wealthy; Prosperous | 👧 Girl | Spanish | — |
| Odalys | Wealthy; Prosperous | 👧 Girl | Spanish | — |
| Oday | Runner; Swift | 👦 Boy | Arabic | — |
| Oded | Encouragement; Restorer | 👦 Boy | Hebrew | — |
| Odete | Wealth | 👧 Girl | Portuguese | — |
| Odette | Wealth | 👧 Girl | French | — |
| Odhiambo | Born in the evening | 👦 Boy | Luo | — |
| Odile | Wealth; Prosperous | 👧 Girl | French | — |
| Odunayo | Year of joy | 👧 Girl | Yoruba | — |
| Odwa | Completed; Fulfilled | 👦 Boy | Xhosa | — |
| Odysseas | Odysseus, the hero of the Odyssey | 👦 Boy | Greek | — |
| Ofa | Love (Tongan ʻOfa) | 🧒 Unisex | Samoan | — |
| Ofek | Horizon | 👦 Boy | Hebrew | — |
| Ofelia | Help | 👧 Girl | Spanish | — |
| Ofentse | Victorious | 🧒 Unisex | Tswana | — |
| Ofer | Young deer; Fawn | 👦 Boy | Hebrew | — |
| Ofir | The land of gold (Ophir) | 👦 Boy | Hebrew | — |
| Ogbonna | Image of his father | 👦 Boy | Igbo | — |
| Oge | Time | 👧 Girl | Igbo | — |
| Ogechi | God's time | 👧 Girl | Igbo | — |
| Ogechukwu | God's time is best | 👧 Girl | Igbo | — |
| Ogochukwu | Glory of God | 👧 Girl | Igbo | — |
| Oğulcan | Son and soul | 👦 Boy | Turkish | — |
| Ogün | Strong; Mighty | 👦 Boy | Turkish | — |
| Oğuz | The legendary ancestor of the Oghuz Turks | 👦 Boy | Turkish | — |
| Oğuzhan | Ruler of the Oghuz | 👦 Boy | Turkish | — |
| Ohad | Loving; Beloved | 👦 Boy | Hebrew | — |
| Ohoud | Promises; Covenants | 👧 Girl | Arabic | — |
| Oishee | Divine; Goddess-like | 👧 Girl | Bengali | Vrishabh |
| Oisín | Little deer | 👦 Boy | Irish | — |
| Ojas | Vitality; Energy | 👦 Boy | Sanskrit, Marathi | Vrishabh |
| Ojasvi | Bright; Radiant | 👦 Boy | Sanskrit | Vrishabh |
| Ojasvini | Bright; Radiant | 👧 Girl | Sanskrit | Vrishabh |
| Okan | Intelligent; Understanding | 👦 Boy | Turkish | — |
| Okba | After Uqba ibn Nafi | 👦 Boy | Arabic | — |
| Okechukwu | Gift of God | 👦 Boy | Igbo | — |
| Okey | Gift of God (Okechukwu) | 👦 Boy | Igbo | — |
| Ökkeş | After Ukkasha (Companion of the Prophet) | 👦 Boy | Turkish | — |
| Oksana | Hospitable (Xenia) | 👧 Girl | Ukrainian | — |
| Oktay | Arrow and foal | 👦 Boy | Turkish | — |
| Okuhle | The good one | 👧 Girl | Xhosa | — |
| Ola | Exalted; Highness | 👧 Girl | Arabic | — |
| Olabisi | Joy has increased | 👧 Girl | Yoruba | — |
| Olabode | Wealth has arrived | 👦 Boy | Yoruba | — |
| Oladapo | Wealth is complete | 👦 Boy | Yoruba | — |
| Oladele | Wealth has come home | 👦 Boy | Yoruba | — |
| Oladimeji | Wealth has doubled | 👦 Boy | Yoruba | — |
| Oladipo | Wealth has multiplied | 👦 Boy | Yoruba | — |
| Oladipupo | Wealth has multiplied | 👦 Boy | Yoruba | — |
| Olaf | Ancestor's heir | 👦 Boy | Norwegian | — |
| Ólafur | Ancestor's heir | 👦 Boy | Icelandic | — |
| Olaide | Wealth has arrived | 👧 Girl | Yoruba | — |
| Olaitan | Endless wealth | 🧒 Unisex | Yoruba | — |
| Olajide | Wealth has awoken | 👦 Boy | Yoruba | — |
| Olajumoke | Wealth to be cherished by all | 👧 Girl | Yoruba | — |
| Olakunle | Wealth fills the home | 👦 Boy | Yoruba | — |
| Olalekan | Wealth has increased | 👦 Boy | Yoruba | — |
| Olaleye | Wealth has dignity | 👦 Boy | Yoruba | — |
| Olamide | My wealth has arrived | 🧒 Unisex | Yoruba | — |
| Olamilekan | My wealth has increased | 👦 Boy | Yoruba | — |
| Olanike | Wealth to be cherished | 👧 Girl | Yoruba | — |
| Olaniyi | Wealth has honour | 👦 Boy | Yoruba | — |
| Olanrewaju | Wealth is moving forward | 🧒 Unisex | Yoruba | — |
| Olaoluwa | Wealth of God | 👦 Boy | Yoruba | — |
| Olasunkanmi | Wealth has come closer to me | 👦 Boy | Yoruba | — |
| Olatunde | Wealth has returned | 👦 Boy | Yoruba | — |
| Olatunji | Wealth has awoken again | 🧒 Unisex | Yoruba | — |
| Olawale | Wealth has come home | 👦 Boy | Yoruba | — |
| Olayemi | Wealth befits me | 🧒 Unisex | Yoruba | — |
| Olayinka | Wealth surrounds me | 🧒 Unisex | Yoruba | — |
| Olayiwola | Wealth has turned into honour | 👦 Boy | Yoruba | — |
| Olcay | Lucky moon | 🧒 Unisex | Turkish | — |
| Ole | Ancestor's heir (Olaf) | 👦 Boy | Norwegian | — |
| Olebogeng | Thank (God) | 👦 Boy | Tswana | — |
| Oleg | Holy; From Norse Helgi (Олег) | 👦 Boy | Norse | — |
| Oleh | Holy (Oleg) | 👦 Boy | Ukrainian | — |
| Oleksandr | Defender of people | 👦 Boy | Ukrainian | — |
| Olena | Light (Helen) | 👧 Girl | Ukrainian | — |
| Olesya | Of the forest; Defender of mankind | 👧 Girl | Russian | — |
| Olfa | Harmony; Intimacy | 👧 Girl | Arabic | — |
| Olfat | Harmony; Intimacy | 👧 Girl | Arabic | — |
| Olga | Holy; From Norse Helga (Ольга) | 👧 Girl | Norse | — |
| Olimpia | Of Olympus | 👧 Girl | Italian | — |
| Olinda | Protector of property | 👧 Girl | Portuguese | — |
| Oliva | Olive | 👧 Girl | Spanish | — |
| Oliver | Olive tree | 👦 Boy | International | — |
| Olivia | Olive tree | 👧 Girl | International | — |
| Olivier | Olive tree | 👦 Boy | French | — |
| Oliviero | Olive tree | 👦 Boy | Italian | — |
| Oliwia | Olive tree | 👧 Girl | Polish | — |
| Olle | Ancestor's heir (Olof) | 👦 Boy | Swedish | — |
| Olli | Ancestor's heir (Olavi) | 👦 Boy | Finnish | — |
| Ollie | Olive tree (Oliver) | 👦 Boy | English | — |
| Olly | Olive tree (Oliver) | 👦 Boy | English | — |
| Olof | Ancestor's heir | 👦 Boy | Norse | — |
| Olubunmi | God's gift | 👧 Girl | Yoruba | — |
| Oluchi | God's work | 👧 Girl | Igbo | — |
| Olufemi | God loves me | 👦 Boy | Yoruba | — |
| Olufunke | God has given me to cherish | 👧 Girl | Yoruba | — |
| Olugbenga | God has lifted me | 👦 Boy | Yoruba | — |