Names
- MacAdam, David L.1
- MacBeth Corporation1
- Mack, Mrs. Julian E.1
- Majumdar, K.1
- Malesky, George.1
- March, Benjamin Franklin, 1899-1934.1
- Marckwardt, Albert Henry, 1903-1975.1
- Marley, Faye1
- Marquardt, William F.1
- Martin, Andrew D., 1972-1
- Masterson, Keith D.1
- McClure, Roy Donaldson, 1882-1951.1
- McDonald, Terrence J.1
- McDowell, C. S.1
- McGregor, Tracy William, 1869-1936.1
- McMath, Francis Charles, 1867-1938.1
- McMath, Robert R.1
- McMath, Robert R. (Robert Raynolds), 1891-19621
- McMath, Robert R. (Robert Raynolds), 1891-1962.1
- McMath-Hulbert Observatory (University of Michigan)1