- Marucelli, Francesco, 1625-17031
- Mass1
- Massachusetts--Wellesley1
- Massachusetts--Williamstown1
- Materia medica1
- Mayenne, Charles de Lorraine, Duc de, 1554-16111
- Medina Sidonia, Alonso Pérez de Guzmán, duque de, 1550-16191
- Medina Sidonia, Juan Alonso de Guzmán, Duque de, -15581
- Medina, Francisco de, 1544-16151
- Mendoza, Antonio de, approximately 1492-15521
- Merchants1
- Mexico--Chiapas1
- Mexico--Culhuacán1
- Mexico--Michoacán de Ocampo1
- Mexico--Perote1
- Mexico--Veracruz-Llave (State)1
- Mexico--Zumpango (Municipio)1
- Mineral industries1
- Miners1
- Mines and mineral resources1