| Ohana | - | Australian Name | Ohanna | - | Algerian Name |
| Oharra | - | Japanese Name | Oiara | - | Turkish Name |
| Oihan | - | Turkish Name | Oilina | - | Eskimo Name |
| Oinaz | - | Turkish Name | Oindrila | - | Hindu Name |
| Oinuka | - | Eskimo Name | Oiruka | - | Eskimo Name |
| Oisel | - | Turkish Name | Oisika | - | Eskimo Name |
| Oisila | - | Turkish Name | Oivana | - | Turkish Name |
| Oivela | - | Turkish Name | Oivika | - | Eskimo Name |
| Oiya | - | Indonesian Name | Oja | - | Hindu Name |
| Ojal | - | Indian Name | Ojasvi | - | Hindu Name |
| Ojaswini | - | Indian Name | Ojaswini | - | Hindu Name |
| Ok-bin | - | Korean Name | Ok-hee | - | Korean Name |
| Ok-hwa | - | Korean Name | Ok-joo | - | Korean Name |
| Ok-kyung | - | Korean Name | Ok-mi | - | Korean Name |
| Ok-nim | - | Korean Name | Ok-ran | - | Korean Name |
| Ok-sun | - | Korean Name | Ok-young | - | Korean Name |
| Okelani | - | Hawaiian Name | Oki | - | Japanese Name |
| Okimma | - | African Name | OKSANA | - | Russian Name |
| Oksana | - | Ukrainian Name | Oksanochka | - | Ukrainian Name |
| Oksentyna | - | Ukrainian Name | Oktavia | - | Indonesian Name |
| Ola | - | Hawaiian Name | Olabisi | - | Egyptian Name |
| Olathe | - | American Name |
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