Name
- Magnin, Charles, librarian at Bibliothèque Royale1
- Magnus, Philip, 1st Baronet1
- Magrath, Edward, Sec Athenaeum Club1
- Major, Richard Henry, Keeper of Printed Maps and Plans British Museum1
- Mallet, Frances1
- Manby, Charles, civil engineer1
- Manners, John James Robert, Lord John Manners, 7th Duke of Rutland1
- Manning, Anne, miscellaneous writer1
- Martin, Samuel, Baron of the Exchequer1
- Martineau, Russell, orientalist, Assistant Keeper British Museum Library1
- Mathews, Charles James, actor and dramatist1
- Mathews, Elkin, bookseller1
- Maty, H, son of Reverend Paul Henry Maty?1
- Maty, Matthew, Dr Principal Librarian British Museum1
- Maule, Fox, 11th Earl of Dalhousie, 2nd Baron Panmure, afterwards Maule-Ramsay, army officer and politician, 1801-18741
- Maule, Montagu, née Abercromby, wife of Fox Maule 2nd Baron Panmure and 11th Earl of Dalhousie, 1807-18531
- Maurice, Thomas, Reverend Oriental scholar and historian, Assistant Keeper of Manuscripts British Museum1
- Mayne, Richard, police commissioner1
- Mazzim, Joseph1
- McCrimmon, Barbara Smith, bibliographer1