Names
- M. Alonso & Company3
- M. Bustillo & Merriam (Hillsborough County, Tampa, Florida)3
- M. Bustillo and Company (Hillsborough County, Tampa, Florida)3
- M.H. Smaltz & Son (Womelsdorf, Pennsylvania)3
- Mabee, John3
- MacKellar, Helen, 1895-19663
- MacRae, Sheila, 1921-20143
- Macchio, Ralph, 1961-3
- Mack, Cecil, 1883-19443
- Macready, George, 1899-19733
- Macy, Bill, 1922-3
- Maguire, Charlotte Edwards3
- Maguire, Kathleen, 1925-19893
- Mahan, Charles S. (1938-)3
- Main, Laurie3
- Mallory, Stephen Russell, 1848-1907.3
- Mamprejew, Nicole3
- Manhattan Theatre Club3
- Mann, Paul, 1915-19853
- Manoff, Dinah3