| Nikica | | - | Croatian, Serbian | |
| Nikola (1) | | - | Serbian, Croatian, Slovene, Bulgarian, Macedonian, Hungarian, Czech, Basque, Medieval Slavic | |
| Nikolina | | - | Bulgarian, Croatian, Serbian, Macedonian | |
| Ninoslav | | - | Serbian, Croatian, Medieval Slavic | |
| Novak | | - | Serbian | |
| Obrad | | - | Serbian | |
| Ognjan | | - | Croatian, Serbian | |
| Ognjen | | - | Croatian, Serbian | |
| Olgica | | - | Macedonian, Serbian | |
| Oliver | | AHL-ə-vər (English), AW-lee-ver (German), O-lee-ver (Finnish) | English, German, Swedish, Norwegian, Danish, Finnish, Estonian, Serbian, Croatian, Macedonian, Czech | |
| Olivera | | - | Serbian, Croatian, Macedonian | |
| Olja | | - | Serbian | |
| Pavle | | - | Serbian, Macedonian, Croatian, Georgian | |
| Pedja | | - | Serbian | |
| Pejo | | - | Croatian, Serbian | |