| Nussen | - | Yiddish Name | Nutan | - | Indian Name |
| Nuvik | - | Eskimo Name | Nyall˜ | - | Irish Name |
| Nyasore | - | American Name | Nybjorn | - | Norse Name |
| Nye | - | Welsh Name | Nykhor | - | Ukrainian Name |
| Nykodym | - | Ukrainian Name | Nykolai | - | Ukrainian Name |
| Nykolai-Oleksandrovych | - | Ukrainian Name | Nykolashko | - | Ukrainian Name |
| Nykon | - | Ukrainian Name | Nykoniy | - | Ukrainian Name |
| Nyle | - | United States Name | Nyman | - | United States Name |
| Nymphas | - | Biblical Name | Nymrod | - | Philippines Name |
| Nyron | - | West Indies Name | Nystein | - | Norse Name |
| Nüzhet | - | Turkish Name | Næfr | - | Icelandic Name |
| Nökkvi | - | Icelandic Name | O?ulcan | - | Turkish Name |
| O?uzhan | - | Turkish Name | Oakes | - | English Name |
| Oakley | - | English Name | Oaklie | - | English Name |
| Oalik | - | Eskimo Name | Oaluq | - | Eskimo Name |
| Oanaq | - | Eskimo Name | Oanuk | - | Eskimo Name |
| Oarvik | - | Eskimo Name | Oasik | - | Eskimo Name |
| Oatuk | - | Eskimo Name | Oavik | - | Eskimo Name |
| Oazik | - | Eskimo Name | Oba | - | Egyptian Name |
| Obaal | - | Phoenician Name | Obadiah | - | Biblical Name |
| Obaid | - | Muslim Name | Obal | - | Biblical Name |
| Obalesh | - | Hindu Name | OBannon | - | English Name |
| Obasi | - | African Name | Obed | - | Biblical Name |
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