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- Maxwell, Samuel Steen, 1860- author1
- Mayo, Gertrude, author1
- McCoy, Frank, author1
- McDonald, Archibald Leete, 1879- author1
- McDougall, William, 1871-1938, author1
- McEwen, Robert Stanley, 1888-1967, author1
- McKenzie, R. Tait (Robert Tait), 1867-1938, author1
- McLaughlin, Allan J. (Allan Joseph), 1872-1961, author1
- McNair, James Birtley, 1889-1967, author1
- McQuillan, Arthur H. (Arthur Harold), 1895-1976, author1
- Meller, Josef, 1874- author1
- Mitchell, Philip H. (Philip Henry), 1883-1955, author1
- Moore, Carl R. (Carl Richard), 1892-1955, author1
- Moore, Harry H. (Harry Hascall), 1881-1949, author1
- Morgan, Thomas Hunt, 1866-1945, author1
- Morgulis, Sergius, 1885-1971, author1
- Morrey, Charles Bradfield, 1869-1954, author1
- Morris, Roger Sylvester, 1877- author1
- Morse, John Lovett, 1865-1940, author1