Name
- Mackenzie, C-, Dr1
- Mackenzie, Murdoch1
- Mackey, Spring1
- Magalhaens, Joao Hyacinthe, Abbade1
- Manetti, Saverio, Professor of Medicine and Botany at Florence1
- Mangor, Elovius, of Copenhagen1
- Martin, John, of Add MS 285391
- Martin, William, of Add MS 285391
- Martyn, Thomas, Rector of Pertenhall; Professor of Botany at Cambridge1
- Marx, M- Jacob1
- Maskelyne, Nevil, DD, FRS; Astronomer Royal1
- Mason, Charles, DD, FRS; Woodwardian Professor at Cambridge1
- Maty, Matthew, Dr Principal Librarian British Museum1
- Maumont, Roques, President of the United Churches of Lower Saxony1
- Mayersbach, Maurice1
- Mea-son, Gilbert, of Leith1
- Meerman, Gerardus, Dutch director and book collector, pensionary of Rotterdam, 1722-17711
- Merry, Antonio1
- Meuschen, Friedrich Christian, Naturalist1
- Meyer, D- L-1