Name
- Lützow, of Mecklenburg-Schwerin2
- Maitland, James, 8th Earl of Lauderdale2
- Marianne, wife of Prince William of Prussia, brother of Frederick William III2
- Marine Society2
- Menshikov, Aleksandr Sergeevich, Prince, Russian statesman, 1787-18672
- Mentzingen, Antoinette, of Baden2
- Merle, Gibbons, journalist2
- Merveldt, Maximilian, General Count; afterwards Austrian Ambassador in London2
- Meyendorff, Petr Kazimirovich, Baron, Russian diplomatist2
- Mills, George, of the Diplomatic Service; of Add MS 472862
- Mitchell, John, of Add MS 472892
- Moltke, Carl Emil, Count, Danish Minister in London2
- Morny, Charles Auguste Louis Joseph, Duc de Morny 1862; Comte, French statesman2
- Moët and Co, J., champagne makers, of Épernay2
- Münster, Ernst Friedrich Herbert zu, Count Hanoverian Minister in London2
- Navy of England2
- Navy of France2
- Neipperg, Adam Albert, Count, Austrian general2
- Nevill, Henry, 2nd Earl of Abergavenny2
- Nicolle, Charles Dominique, Abbé; of the Collège de Sainte Barbe, Paris2