People beginning with M
- MacCallan, Arthur Ferguson
- MacCallum, William George
- Macewen, William
- MacEwen, Gregory Dean
- Mach, Ernst Waldfried Josef Wenzel
- Machado, Astrogildo
- Macintosh, Charles
- MacIntyre, William
- Mackenrodt, Alwin Karl
- Mackenzie, Richard James
- MacKenzie, Sir Stephen
- Macklin, Madge Thurlow
- MacLennan, Alexander
- Macleod, William Mathieson
- MacMahon, H. M.
- Maddox, Ernest Edmund
- Madelung, Otto Wilhelm
- Madura, (District of India)
- Maestre de San Juan, Aureliano
- Maffucci, Angelo
- Magath, Thomas Byrd
- Magee, Kenneth Raymond
- Magendantz, Heinz
- Magendie, François
- Magenis, Ruth Ellen