| Ori | - | Yiddish Name | Orien | - | Phoenician Name |
| Orion | - | Greek Name | Orion | - | Hindu Name |
| Orion | - | United States Name | Orisel | - | Cyprien Name |
| Orishe | - | Yiddish Name | Orke | - | Yiddish Name |
| Orlan | - | Indonesian Name | Orlando | - | German Name |
| Orley | - | United States Name | Orli | - | Yiddish Name |
| Orlin | - | United States Name | Orlyk | - | Ukrainian Name |
| Ormand | - | United States Name | Orn | - | Norse Name |
| Ornan | - | Biblical Name | Orrathat | - | Thai Name |
| Orri | - | Icelandic Name | Orsarot | - | Thai Name |
| Orson | - | United States Name | Orton | - | English Name |
| Ortwin | - | Swiss Name | Oruç | - | Turkish Name |
| Orval | - | United States Name | Orvar | - | Norse Name |
| Orvel | - | Cyprien Name | Orvian | - | Cyprien Name |
| Orviel | - | Cyprien Name | Orville | - | United States Name |
| Orwel | - | Welsh Name | Oryan | - | Cyprien Name |
| Osahar | - | Egyptian Name | OSAMA | - | Muslim Name |
| Osama | - | Algerian Name | Osaze | - | Egyptian Name |
| Osborn | - | United States Name | Oscar | - | English Name |
| Osei | - | Cameroon Name |
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