| Nikias | | - | Ancient Greek | |
| Nikica | | - | Croatian, Serbian | |
| Nikifor | | - | Russian, Bulgarian, Macedonian | |
| Niko | | NEE-ko (Finnish) | Finnish, Croatian, Slovene | |
| Nikodemos | | - | Ancient Greek, Biblical Greek | |
| Nikodim | | - | Russian, Macedonian | |
| Nikol | | - | Czech, Bulgarian | |
| Nikola (1) | | - | Serbian, Croatian, Slovene, Bulgarian, Macedonian, Hungarian, Czech, Basque, Medieval Slavic | |
| Nikola (2) | | NEE-ko-lah (German) | German, Polish, Czech, Slovak | |
| Nikolaas | | - | Dutch | |
| Nikolaos | | - | Ancient Greek, Greek | |
| Nikolche | | - | Macedonian | |
| Nikolina | | - | Bulgarian, Croatian, Serbian, Macedonian | |
| Nikomachos | | - | Ancient Greek | |
| Nikomedes | | - | Ancient Greek | |