Name
- Macmillan Company, publishers, of New York, 1896-19981
- Macmillan, Frederick Orridge, publisher1
- Macmillan, George Augustin, publisher, 1855-19361
- Macmillan, Maurice Crawford, publisher1
- Macquoid, Thomas Robert, artist and illustrator1
- Mahaffy, John Pentland, Provost of Trinity College Dublin1
- Maitland, John Alexander Fuller-, music critic, 1856-19361
- Malcolm, Ian Zachary, KCMG, MP1
- Mallet, Bernard, KCB1
- Mare, Walter John, poet, 1873-19561
- Marsh, Edward Howard, Knight, civil servant and patron of the arts, 1872-19531
- Marshall, Alfred, economist1
- Marshall, Mary, née Paley political economist, wife of A Marshall1
- Marston, Robert Bright, author1
- Martin, Frances, author1
- Martin, Frederick, Editor Statesman's Year Book1
- Mason, Alfred Edward Woodley, author1
- Masson, David Mather, biographer1
- Maurice, Annie, wife of Major-General Sir J F Maurice1
- Maurice, Georgiana, wife of F D Maurice1