| MACHTELD f Dutch |
| MACIEJ m Polish |
| MADDIE f English |
| MADDISON f English (Modern) |
| MADDY f English |
| MADISON f & m English |
| MADISYN f English (Modern) |
| MADS m Danish |
| MADYSON f English (Modern) |
| MAFALDA f Italian, Portuguese |
| MAHAUT f French |
| MAHTHILDIS f Ancient Germanic |
| MAITIÚ m Irish |
| MAKAIO m Hawaiian |
| MALLT f Welsh |
| MAT m English |
| MATAS m Lithuanian |
| MÁTÉ m Hungarian |
| MATE m Croatian |
| MATEA f Croatian |
| MATĚJ m Czech |
| MATEJ m Slovak, Slovene, Croatian, Macedonian |
| MATEJA (1) f Slovene, Croatian |
| MATEJA (2) m Serbian |
| MATEO m Spanish, Croatian |
| MATEU m Catalan |
| MATEUS m Portuguese |
| MATEUSZ m Polish |
| MATEVŽ m Slovene |
| MATFEY m Russian |
| MATHEUS m Portuguese (Brazilian) |
| MATHEW m English |
| MATHIAS m French, German, Swedish, Norwegian, Danish |
| MATHIEU m French |
| MATHILDA f English, Swedish, Ancient Germanic |
| MATHILDE f French, German, Dutch, Norwegian, Danish |
| MATHIS m German, French |
| MATIA m Basque |
| MATÍAS m Spanish |
| MATIAS m Finnish, Portuguese |
| MATIC m Slovene |
| MATIJA m & f Slovene, Croatian, Serbian |
| MATILD f Hungarian |
| MATILDA f English, Swedish, Finnish, Slovak |
| MATILDE f Spanish, Portuguese, Italian |
| MATJAŽ m Slovene |
| MATKO m Croatian |
| MATO m Croatian |
| MATOUŠ m Czech |
| MATS m Swedish, Norwegian |
| MATT m English |
| MATTEO m Italian |
| MATTEUS m Swedish, Norwegian |
| MATTHAIOS m Biblical Greek |
| MATTHÄUS m German |
| MATTHEI m Old Church Slavic |
| MATTHEUS m Biblical Latin |
| MATTHEW m English, Biblical |
| MATTHIA m Old Church Slavic |
| MATTHIAS m Greek, German, Swedish, Norwegian, Danish, French, Dutch, Biblical, Biblical Latin, Biblical Greek |
| MATTHIEU m French |
| MATTHIJS m Dutch |
| MATTI m Finnish |
| MATTIA m Italian |
| MATTIAS m German, Swedish |
| MATTIE f & m English |
| MATTITHYAHU m Hebrew |
| MATTITYAHU m Hebrew, Biblical Hebrew |
| MATTY (1) m English |
| MATÚŠ m Slovak |
| MATVEI m Russian |
| MATVEY m Russian |
| MÁTYÁS m Hungarian |
| MATYLDA f Czech, Polish |
| MAUD f English, Dutch |
| MAUDE f English |
| MAUDIE f English |
| MECHTELD f Dutch |
| MECHTHILD f German |
| MECHTILDE f German |
| MOTYA m & f Russian |
| THIJS m Dutch |
| TIES m Dutch |
| TIL f Dutch, Limburgish |
| TILDA f English, Swedish, Finnish |
| TILLIE f English |
| TILLY f English |
| TJAŽ m Slovene |
