| Marika | | MAH-ree-kah (Finnish) | Czech, Slovak, Polish, Hungarian, Greek, Finnish, Estonian | |
| MarkÉTa | | - | Czech, Slovak | |
| Marta | | MAHR-tah (Spanish, Italian, Polish, Czech) | Spanish, Italian, Portuguese, Catalan, Polish, Czech, Slovak, German, Dutch, Romanian, Slovene, Bulg | |
| Martin | | MAHR-tən (English), mar-TEN (French), MAHR-teen (German, Finnish), MAHR-tin (Swedish, Norwegian, Danish), MAWR-teen (Hungarian), mahr-TIN (Bulgarian) | English, French, German, Swedish, Norwegian, Danish, Russian, Romanian, Czech, Slovak, Slovene, Croa | |
| Martina | | mahr-TEE-nah (Italian, Spanish, Dutch), mahr-TEEN-ə (English) | German, Italian, Spanish, Catalan, Czech, Slovak, Croatian, Slovene, English, Swedish, Dutch, Ancien | |
| MatĚJ | | - | Czech | |
| MatouŠ | | - | Czech | |
| MatyÁŠ | | - | Czech | |
| Matylda | | mah-TIL-dah (Polish) | Czech, Polish | |
| MaxmiliÁN | | - | Czech | |
| MelÁNie | | - | Czech | |
| MetodĚJ | | - | Czech | |
| Michael | | MIE-kəl (English), MI-khah-el (German), MEE-kah-el (Swedish, Norwegian, Danish) | English, German, Swedish, Norwegian, Danish, Dutch, Czech, Biblical, Biblical Latin, Biblical Greek | |
| Michaela | | mi-khah-E-lah (German), mi-KAY-lə (English) | German, Swedish, English, Czech, Slovak | |
| Michal (1) | | - | Czech, Slovak | |