Madolina (Italian): Probably a form of Magdalena.
Madrona (Spanish, Catalan): “Lady,” from Latin word matrona.
Magnifica (Italian): “Magnificent, excellent, splendid.”
Marquessa (Spanish): “Marquise,” from Old French marchis and markis. The ultimate root is the Old High German word marka (fortified area along a border; march).
Massipa (Judeo–Catalan): Derived from Christian Catalan surname Massip/Macip, from Latin word mancipium (learner, servant, younger).
Maymuna (Moorish Arabic): “Blessed, prosperous, thriving.”
Melior (English): “Better,” from a Latin word with that meaning. The modern form is Meliora.
Melisende (French): Form of Millicent, derived from Ancient Germanic name Amalasuintha. Its roots are amal (labour, work) and swinth (strong).
Memorantia (English and Dutch): “Remembering,” from the Latin word.
Merewen, Merwenn, Merewynn (English): “Famous joy,” from Old English name Mærwynn. Its roots are mær (famous) and wynn (joy).
Merilda (English): Form of Old English name Mærhild.
Militsa (Slavic): “Gracious,” from root milu. It was originally a nickname for names beginning in Mil-. Its modern form is Milica (Slovenian, Macedonian, Serbian, Croatian).
Mirea (Judeo–Catalan): “Myrrh,” from Ladino (Judeo–Spanish) mira; a variation of popular Catalan name Mira (notable); or a nickname for Miriam,
Mireti (Moorish Arabic)
Munisa (Arabic): This is also a modern Uzbek, Bosnian, and Tajik name.
Muscata (Italian): “Nutmeg.”
Mutayyam (Moorish Arabic): “Captive of love.”
Muzna (Moorish Arabic): “Cloud, rain.”
Mechislav (Slavic): “Sword of glory,” from roots mechi and slava. The modern form is Mieczysław (Polish). The original form is a rare modern Russian name. Like all names ending in -slav, -mir, and -mil, it can become a female name by adding an A to the end.
Merkel (Silesian–German): Nickname for Markward, which ultimately descends from Ancient Germanic name Marcaward. Its roots are Celtic marca and Old High German marah (horse), or marka (border), and Old High German wart (guard).
Metfried (German): From roots maht (strength, might) and frid (peace).
Mezamir (Slavic): “Great boundary,” “Boundary of peace,” or “Boundary of the world,” from a Proto–Slavic root meaning “limit, boundary, landmark” (which evolved into Old Church Slavonic mežda), and mer (famous, great) or mir (peace, world).
Milogost (Slavic): “Gracious guest,” from roots milu (dear, gracioius) and gosti. The modern form is Miłogost (Polish).
Miqueu (Occitan): Form of Michael (Who is like God?). This is also the modern Gascon form.
Mundi (Swedish and Norman): Nickname for Old Norse Agmundr, derived from elements ag (edge of a sword) or agi (terror, awe), and mundr (protection).
Mundir (Moorish Arabic): “Cautioner, warner.”
Munio (Basque): The feminine form was Munia.
Mundzuk (Turkic): Possibly “bead, jewel,” from root mončuq.