- Mary Magdalene, Saint1
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- Materia medica1
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- Mayenne, Charles de Lorraine, Duc de, 1554-16111
- Meat inspection (Jewish law)1
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- Medici, Alessandro de', 1510-15371
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- Medina Sidonia, Alonso Pérez de Guzmán, duque de, 1550-16191
- Medina Sidonia, Juan Alonso de Guzmán, Duque de, -15581
- Medina, Francisco de, 1544-16151
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