| Othman | عثمان | Name of the third Caliph of Islam, a companion of Prophet Muhammad (PBUH) |
| Otoniel | عتوانیل | God’s strength or God is my power |
| Ousama | أسامة | Lion or strong |
| Ousman | عثمان | Variant of Othman, a companion of Prophet Muhammad (PBUH) |
| Ouzair | عزیر | Prophet Ezra in Islam |
| Ovais | عویس | A companion of Prophet Muhammad (PBUH) |
| Ovaish | عویش | Variant of Ovais, meaning a companion of Prophet Muhammad (PBUH) |
| Oves | عویس | Variant of Ovais, meaning a companion of Prophet Muhammad (PBUH) |
| Owaib | عویب | Full moon |
| Owaib | عویب | Variant of Owaib, meaning full moon |
| Owaid | عوید | Small wolf |
| Owais | عویس | A companion of Prophet Muhammad (PBUH) |
| Owakif | عواقف | Dependable or reliable |
| Owan | عوان | Gift of God |
| Oweez | عویز | Variant of Owais, meaning a companion of Prophet Muhammad (PBUH) |
| Owen | اوین | Well-born, young warrior |
| Owes | عویس | Variant of Ovais, meaning a companion of Prophet Muhammad (PBUH) |
| Owez | عویز | Variant of Owais, meaning a companion of Prophet Muhammad (PBUH) |
| Ozaafar | عضافر | Variant of Azfar, meaning victorious |
| Ozaafar | عضافر | Variant of Azfar, meaning victorious |
| Ozaif | عظیف | Guest or the one who provides shelter |
| Ozain | عزین | Beautiful, handsome |
| Ozair | عزیر | Variant of Ouzair, Prophet Ezra in Islam |
| Ozan | اوزان | Balance, scales |
| Ozhan | اوزہان | Gift from God |
| Ozil | عوضیل | Variant of Azil, meaning one who refrains from harming others |
| Obaid | عبید | Small slave, servant |
| Obaida | عبیدہ | Slave, servant |
| Obaidul | عبیدال | Slave of the Most High |
| Obaidullah | عبیداللہ | Servant of Allah |
| Obaydul | عبیداللہ | Servant of the Most High |
| Obeid | عبید | Small slave, servant |
| Obeidulla | عبیداللہ | Servant of Allah |
| Obez | عبید | Small slave, servant |
| Obydul | عبیداللہ | Servant of the Most High |
| Oday | اودے | Short form of Obaid, servant |
| Oemar | عمر | Variant of Umar, life |
| Ohad | احد | Ten, unity |
| Ohammed | محمد | Variant of Muhammad, praised one |
| Oheen | اہین | Superb, excellent |
| Ohidur | اہیدر | The one who believes in oneness of God |
| Ohrmazd | اہرمزد | God in Zoroastrianism |
| Okba | عقبہ | Variant of Aqib, following |
| Oktai | اوکتائی | Turkish name |
| Olfa | الفا | Light, brightness |
| Olia | الیا | One who brings good news |
| Oliur | علیور | The light of the house |
| Olushola | الشولا | Wealth brings happiness |
| Oma | اوما | Commanding, mother |
| Omaid | امید | Hope, expectation |
| Omaijid | عمیجد | One who strives for greatness |
| Omaijid | عمیجد | Variant of Omaijid, striving for greatness |
| Omair | عمیر | Life, long-lived |
| Omair | عمیر | Variant of Umar, life |
| Omais | اومیس | One who is blessed |
| Omaisi | اومیسی | Variant of Omais, blessed |
| Omam | عمام | Leader, head |
| Oman | عمان | Variant of Aman, peace |
| Omar | عمر | Life, long-lived |
| Omar | عمر | Variant of Umar, life |
| Omar-faruk | عمر فاروق | Distinguisher between right and wrong |
| Omaran | عمران | Prosperous, flourishing |
| Omari | عماری | Life, long-lived |
| Omari | عماری | Variant of Umar, life |
| Omarion | عماریون | Blend of Omar and Marion |
| Omarr | عمار | Variant of Umar, life |
| Omary | عماری | Variant of Umar, life |
| Omed | امید | Hope, expectation |
| Omeed | امید | Variant of Omed, hope |
| Omeed | امید | Variant of Omed, hope |
| Omeir | عمیر | Variant of Umar, life |
| Omeir | عمیر | Variant of Umar, life |
| Omen | اومین | Variant of Amin, trustworthy |
| Omer | عمر | Variant of Umar, life |
| Omero | عمرو | Variant of Umar, life |
| Omid | امید | Hope, expectation |
| Omid | امید | Variant of Omed, hope |
| Omidvar | امیدور | Hopeful, optimistic |
| Ommar | عمار | Variant of Umar, life |
| Omor | عمر | Variant of Umar, life |