| Niklaus | | - | German (Swiss) | |
| Niko | | NEE-ko (Finnish) | Finnish, Croatian, Slovene | |
| Nikodem | | nee-KAW-dem | Polish | |
| Nikodim | | - | Russian, Macedonian | |
| Nikola (1) | | - | Serbian, Croatian, Slovene, Bulgarian, Macedonian, Hungarian, Czech, Basque, Medieval Slavic | |
| Nikola (2) | | NEE-ko-lah (German) | German, Polish, Czech, Slovak | |
| Nikolai | | nee-kah-LIE (Russian) | Russian, Bulgarian | |
| Nikolaj | | - | Danish, Slovene | |
| Nikolao | | nee-ko-LAH-o | Esperanto | |
| Nikolas | | - | Greek, English | |
| Nikolay | | nee-kah-LIE (Russian) | Russian, Bulgarian | |
| Nikole | | ni-KOL (English) | Basque, English | |
| Nikolina | | - | Bulgarian, Croatian, Serbian, Macedonian | |
| Nikon | | - | Ancient Greek, Russian | |
| Nilda | | - | Spanish, Portuguese | |