Creator
- Marróquiz, Joaquín2
- Martin, Carlos A.2
- Martinez, Miguel A.2
- Maxey, J. W.2
- Maximilian, Emperor of Mexico2
- Mayone y Ferrari, Joaquín, Count of Cumbre-Hermosa2
- McCallum, Jane Y.2
- McFarland, Jennifer2
- McGaw, Howard F.2
- McKean, Thomas2
- Mejia, J. Manuel2
- Mendoza, José María2
- Mexia, Mariano2
- Meyer, G. A.2
- Millar, Donald2
- Miller, Helen G.2
- Mitchell, Horace2
- Moloch, B.2
- Molotov, Vyacheslav M.2
- Moncada, Ana2