Name
- Libri, Guglielmo, scientist, book collector, and thief, 1802-18691
- Lindsay, Alexander William Crawford, 25th Earl of Crawford and 8th Earl of Balcarres, art historian, 1812-18801
- Lingard, John, of Egerton MS 28411
- Loscombe, Clifton Wintringham, of Add MS 365271
- Lumley, Edward, bookseller1
- Lushington, Stephen Rumbold, Secretary to the Treasury and (1827) Governor of Madras1
- Macaulay, Thomas Babington, Baron Macaulay1
- Mackenzie, Henry, vicar of St. Martin's in the Fields1
- Mackenzie, Robert Shelton, journalist1
- Macray, John, of Egerton MS 28451
- Madden, Frederic, Knight, Keeper of Manuscripts, British Museum, 1801-18731
- Madden, J-, publisher1
- Maitland, Samuel Roffey, Librarian and Keeper of Manuscripts Lambeth Palace1
- Mansel, Family1
- Mansell, William W-, of Egerton MS 28431
- Martin, Edward H-, Sub-treasurer of the Inner Temple1
- Martin, Henry, 3rd Baronet1
- Martin, John Edward1
- Maskell, William, Reverend; of Add MS 367171
- Maulde, M-1