- Hobbs, Charles E.1
- Hoehne, F. C. (Frederico Carlos), 1882-19591
- Hollembaek, Henry.1
- Instituto Médico Nacional (Mexico), author.1
- International Congress for the History of Pharmacy (1988 : Piacenza, Italy)1
- Jimenez, Manuel C., author1
- Kats, Ṭoviyah, 1652?-17291
- King, John, 1813-18931
- Lee, Charles A. (Charles Alfred), 1801-18721
- Lighthall, J. I., 1856-1
- Lyons, A. B. (Albert Brown), 1841-1926, author1
- Mariani, Angelo, 1838-1914, author1
- Marrs, Stella, artist1
- Martius, Karl Friedrich Philipp von, 1794-18681
- Matteson, Antonette, 1847-1
- Mayer, Edward Rodman, 1823-18911
- Merwin, John C.1
- Milne-Edwards, H. (Henri), 1800-18851
- Monroe, John, active 19th century, author1
- Moore, John, of Pennsylvania1