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- Inglish, James.1
- Jackson, William, active 17871
- Kent, Elizabeth Grey, Countess of, 1581-16511
- La Calmette, François de, author1
- Lallier, Francis.1
- Lassone, Joseph-Marie-François de, 1717-1788, author1
- Leigh, Charles, 1662-1701?1
- Lemnius, Levinus, 1505-1568, author1
- Lewis, William, 1708-17811
- London Dispensary.2
- London Hospital (Whitechapel, London, England)1
- Lyceum Medicum Londinense (London, England), author.1
- Lying-in Charity (London, England), author.1
- Lynch, Bernard, -17451
- Lynn, Walter, 1677-17631
- M. S. (Moses Stringer)1
- MacDonald, Alexander Herman, 1774-1
- Maddocks, James, -17861
- Magenise, Daniel.1