- Maximian, Emperor of Rome, approximately 240-3101
- Mayenne, Charles de Lorraine, Duc de, 1554-16111
- Medea, consort of Aegeus, King of Athens (Mythological character)1
- Medical care1
- Medical education1
- Medici, Alamanno de'3
- Medici, Alessandro de', 1510-15374
- 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
- Medici, Carlo de'12
- Medici, Elisabetta de'1
- Medici, Fabrizio de'7
- Medici, Fernando de'1
- Medici, Francesca de'1
- Medici, Giuliano de', 1453-14781