Encyclopedias, Almanacs, Transcripts, and Maps
- Mansfield, J. V. (ca. 1870)
- Manson Benedicks
- Manson, Charles M. (1934-)
- Mantids: Mantodea
- Mantis Shrimps: Stomatopoda
- Mantle Plumes
- Manuel Moschopoulos
- Mapes, James Jay (1806-1866)
- Maple, Eric (William) (1915-)
- Maples
- Maples
- Mapping Techniques
- Marabini, Enrico (1923-)
- Marbode of Rennes
- Marc Isambard Brunel
- Marcel Riesz
- Marcel Vogel, Man of Crystal Vision
- Marcellus Empiricus (ca. 395 C.E.)
- March, Marion (1923-)
- Marcian Edward Hoff Jr