Name
- Monsarrat, Juan, Missionary1
- Monserrat, Joaquin, Marques de Cruillas, Viceroy of New Spain1
- Morfi, Juan Augustin, Fray1
- Mornay, of Add MS 175751
- Mossotti, Fabricio1
- Mudford, William1
- Muñoz, Gabriel, Don1
- Muñoz, Juan Bautista, Don1
- Narvaez, Pedro Sotelo1
- Navarra y Rocafall, Melchor, Duque de la Palata, Don1
- Navarro, Luis Diez1
- O'Brien, Antonio, Don1
- Ocampo, Baltasar, Captain1
- Ojeda, Juan, Don1
- Orejuela, Manuel Josef, Don1
- Orellana, Francisco, Captain1
- Ortoz de Rozas, Domingo1
- Oyarvide, Andres, Don1
- Padilla, Ygnacio, Bishop of Yucatan1
- Palau, Juan, Spanish army officer, engineer and cartographer, 1720-18081