| MÒNica | | - | Catalan | |
| Manel | | - | Catalan | |
| Marc | | MAHRHK (French) | French, Catalan, Welsh | |
| Marcel | | mar-SEL (French), MAHR-tsel (Polish), MAHR-sel (Dutch, German) | French, Catalan, Romanian, Polish, Czech, Slovak, Dutch, German | |
| Margarida | | mar-ga-REE-də (Portuguese) | Portuguese, Galician, Catalan, Occitan | |
| Maria | | mah-REE-ah (Italian, German, Swedish, Norwegian, Danish, Dutch), mə-REE-ə (Catalan, English), MAHR-yah (Polish), MAH-ree-ah (Finnish) | Italian, Portuguese, Catalan, Occitan, German, Swedish, Norwegian, Danish, Faroese, Dutch, Frisian, | |
| Mariona | | - | Catalan | |
| MartÍ | | - | Catalan | |
| Marta | | MAHR-tah (Spanish, Italian, Polish, Czech) | Spanish, Italian, Portuguese, Catalan, Polish, Czech, Slovak, German, Dutch, Romanian, Slovene, Bulg | |
| Martina | | mahr-TEE-nah (Italian, Spanish, Dutch), mahr-TEEN-ə (English) | German, Italian, Spanish, Catalan, Czech, Slovak, Croatian, Slovene, English, Swedish, Dutch, Ancien | |
| Mateu | | - | Catalan | |
| MercÈ | | - | Catalan | |
| Meritxell | | mu-ree-CHEL | Catalan | |
| Miquel | | - | Catalan | |
| Mireia | | mee-RE-yə (Catalan) | Catalan, Spanish | |