Name
- Magnus, Paul Wilhelm, Professor of Botany at Berlin University1
- Mansel-Pleydell, John Clavell, antiquary1
- Mansfield, W, of St Mary Cray1
- Margerie, Emmanuel Jacquin de, French geologist1
- Marjoribanks, Edward, 2nd Baron Tweedmouth1
- Marjoribanks, Fanny Octavia Louisa, wife of Edward 2nd Baron Tweedmouth1
- Markham, Clements Robert, Knight, geographer, 1830-19161
- Marpoudjoglou, Alexandros G, of Samsoun1
- Mary Dominic, Sister of Convent of Mercy Skibbereen Cork1
- Masters, Maxwell Tylden, FRS, botanist1
- McGuire, Joseph Deakins, American anthropologist1
- Merewether, William Lockyer, Knight, army officer and administrator in India, 1825-18801
- Miers, Henry Alexander, mineralogist1
- Milner, Frederick George, 7th Baronet1
- Momtaz, Mohamed, of the Government School Minia Egypt1
- Monckton, Herbert, Town Clerk of Maidstone1
- Monckton, Horace Woollaston, FGS, barrister1
- Monks, Henry, of Atherton1
- Moore, John Murray, MD, of Liverpool1
- Murdoch, Sophia, widow of C T Murdoch MP1