Name
- Louis, John, 2nd Baronet, Rear-Admiral1
- Luce, John Proctor, Lieutenant; RN1
- Lushington, Stephen, Captain; RN GCB 18671
- Lyons, Commander- Edmund Moubray, RN1
- Mackay, Donald Hugh, Rear-Admiral1
- Madge, William Robert, Master, RN1
- Mann, Adrian Thomas, Lieutenant-Commander; RN1
- Mann, James Saumarez, Lieutenant; RN1
- Martin, William Fanshawe, 4th Baronet, Admiral1
- Mason, William Brace, Lieutenant; RN1
- McAusland, Henry, Second Master, RN1
- McCleverty, James Johnstone, Commander; RN1
- Miller, David, Lieutenant; RN1
- Milne, Alexander, 1st Baronet 1876, Admiral; KCB; Lord Commissioner of the Admiralty1
- Moore, Henry Marehant, Clerk, RN1
- Moorman, Richard, Commander; RN1
- Moresby, Fairfax, Knight, naval officer, c 1786-18771
- Muhammad al-Razini, Moroccan Consul at Gibraltar1
- Murray, Augustus George Ernest, Lieutenant; RN1
- Nolloth, Matthew Stainton, Commander; RN1