Name
- Mackay, Donald James, 11th Baron Reay2
- Macmillan and Co, publishers, 1843-2
- Macmillan, Alexander, of Macmillan and Co publishers2
- Macmillan, George Augustin, publisher, 1855-19362
- Martel de Janville, Sibylle Gabrielle Marie Antoinette, Comtesse de Mirabeau-Martel, alias 'Gyp', French novelist2
- Metaxas, Demetrios G., Greek diplomatist2
- Michelidakes, Antonios, Cretan statesman2
- Morley, Arnold, PC; MP; of Add MS 435172
- Mundella, Anthony John, PC, MP2
- Murray, George Herbert, GCB, PC2
- Murray, John, publisher; KCV0. 19262
- Nubar, Pasha, Egyptian-Armenian politician and first Prime Minister of Egypt, 1825-18992
- O'Connor, Thomas Power, MP; of Add MS 425762
- Ollivier, Marie Thérèse, wife of Olivier Emile Ollivier2
- Paget, Walburga Ehrengarde Helena de, Countess née Hohenthal wife of Sir A B Paget2
- Palmer, Roundell, 1st Baron and 1st Earl of Selborne, Lord Chancellor2
- Peel, Arthur Wellesley, 1st Viscount Peel2
- Percival, John, Bishop of Hereford2
- Plunkett, Francis Richard, PC, diplomatist2
- Procter, Anne Benson, wife of B W Procter al 'Barry Cornwall' poet2