- Martini, Alberto, 1876-1954, artist1
- McCollum, Elmer Verner, 1879-19671
- McCombs, Robert S. (Robert Shelmerdine), 1880-, author1
- McCulloch, C. C. Jr. (Champe Carter), 1869-19281
- Meira, Rubião.1
- Montgomery, E. E. (Edward Emmet), 1849-, author1
- Moore, J. Howard (John Howard), 1862-1916, author1