| Miroslava | | mee-rah-SLAH-vah (Russian) | Czech, Slovak, Russian, Croatian, Serbian, Macedonian, Slovene, Medieval Slavic | |
| Monika | | MO-ni-kah (German), maw-NEE-kah (Polish) | German, Swedish, Norwegian, Danish, Czech, Slovak, Polish, Slovene, Croatian, Lithuanian, Latvian | |
| Mstislav | | mstee-SLAHF (Russian) | Czech, Russian, Medieval Slavic | |
| NaĎA | | - | Czech | |
| NadĚŽDa | | - | Czech | |
| NatÁLie | | - | Czech | |
| Nela | | - | Croatian, Slovak, Portuguese, Czech | |
| Nicol (2) | | - | Dutch, German, Czech | |
| Nicola (2) | | NIK-ə-lə (English) | German, Czech, English | |
| 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 | |
| Noemi | | naw-E-mee (Italian) | Italian, German, Czech, Biblical Latin | |
| OldŘIch | | - | Czech | |
| Oliver | | AHL-ə-vər (English), AW-lee-ver (German), O-lee-ver (Finnish) | English, German, Swedish, Norwegian, Danish, Finnish, Estonian, Serbian, Croatian, Macedonian, Czech | |