Name
- Lytton, Edward George Earle Lytton, 1st Baron Lytton, né Bulwer; writer and politician, 1803-18731
- MacCarthy, Justin, MP; author1
- MacDonald, Ishbel, afterwards Ridgley daughter of J R MacDonald Prime Minister1
- Macdonagh, Michael, author and journalist1
- Mackay, Donald James, 11th Baron Reay1
- Mahaffy, John Pentland, Provost of Trinity College Dublin1
- Mahony, Pierce, MP; of Add MS 462291
- Maitland, Frederic William, historian1
- Manoel II, of Portugal1
- Marlow, Arthur Lambert, OBE1
- Marochetti, Carlo, Baron, sculptor1
- Marsh, Edward Howard, Knight, civil servant and patron of the arts, 1872-19531
- Marshal, Herbert Menzies, artist1
- Mary, Queen Consort of King George V, 1867-19531
- Mather, William, of Add MS 462531
- Maud Charlotte Mary Victoria, Princess, 3rd daughter of Edward VII; wife (1896) of Prince Charles of Denmark, afterwards Haakon VII of Norway1
- Maxse, Leopold James, journalist and political activist; editor of 'National Review', 1864-19321
- May, Thomas Erskine, 1st Baron Farnborough, clerk of the House of Commons, 1815-18861
- McBee, Silas, of New York; Editor of 'The Constructive Quarterly'1
- Meade, Robert Henry, civil servant, 1835-18981