Name
- Maupassant, Henri René Albert Guy, author, 1850-18931
- Mavrodi, Helene E, `grande maitresse' of the court of Ferdinand I of Rumania1
- McLaren, John, Lord Advocate1
- Milan Obrenovich, Prince of Serbia1
- Military Geographical Institute of Vienna, 1839-mid 20th century1
- Millais, John Everett, 1st Baronet, painter, 1829-18961
- Monck, Charles Stanley, 1st Baron Monck1
- Mounsey, John Giles, solicitor1
- Mozley, Anne, author1
- Muir Mackenzie, Kenneth Augustus, Baron Muir Mackenzie1
- Muminagić, Abdulah, geodesist, 1919-20011
- Murray, James Augustus Henry, lexicographer1
- Oldenburg, Grand Duke of. Peter II1
- Oscar II, of Sweden1
- Ostrovsky, Mikhail Nikolaevich, Russian Minister of Domains1
- Overton, John Henry, canon of Peterborough1
- Paget, Ralph Spencer, KCMG, diplomatist, 2nd son of Sir Augustus Berkeley Paget1
- Paget, Walburga Ehrengarde Helena de, Countess née Hohenthal wife of Sir A B Paget1
- Parker, Charles Stuart, MP1
- Paul, Prince Regent of Yugoslavia, grandson of Alexander I Prince of Serbia1