- Mathematical recreations1
- Mathematics8
- Mathematics, Arab18
- Mathematics, Greek4
- Maurice, Saint, -approximately 2871
- Maximian, Emperor of Rome, approximately 240-3101
- Maximilian I, Holy Roman Emperor, 1459-15191
- Małogoszcz (Poland)1
- Mechanics1
- Medea, consort of Aegeus, King of Athens (Mythological character)1
- Medical astrology1
- Medici, Alamanno de'3
- Medici, Alessandro de', 1510-15372
- Medici, Andrea de'8
- Medici, Bastiano de'1
- Medici, Bernardo d'Alamanno de'2
- Medici, Bernardo de'3
- Medici, Bivigliano de'5
- Medici, Camillo de'4
- Medici, Carlo Bernardo Alamanni de'1