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- Maris Martinsons (1960) – professor of strategic management, international business consultant
- Hermanis Matisons (1894–1932) – chess player
- Zenta Mauriņa (1897–1978) – writer, literary scholar, culture philosopher
- Juris Māters (1845–1884) – author, lawyer and journalist, translated laws to Latvian and created the foundation for Latvian law
- Arnis Mednis
- Zigfrīds Anna Meierovics (1887–1925) – first Latvian Minister of Foreign Affairs
- Leo Mihelsons (1887–1978) – artist
- Arnolds Mikelsons (1922–1984) – artist
- Evgenijs Millers (1867–1938) – czarist Russian general
- Vita Millers (1984) – first Latvian structured products journalist, and leading light in the Latvian London choir
- Kārlis Mīlenbahs (1853–1916) – linguist
Read more about this topic: List Of Latvians