| McClure, Charles Freeman Williams |
| McMurphy, James Ira |
| Meisen, Jakob |
| Meisenheimer, Johannes |
| Meissner, Carl Friedrich |
| Meissner, Richard |
| Meltzer, Samuel James |
| Menge, Friedrich |
| Menz, Johanna |
| Mercklin, Carl Eugen von |
| Merrill, Elmer Drew |
| Metcalf, Maynard M. |
| Mettenius, Georg Heinrich |
| Metz, Carl |
| Meves, Johann Friedrich |
| Meyen, Franz Julius Ferdinand |
| Meyer, Arthur |
| Meyer, Friedrich Jürgen |
| Meyer, Fritz |
| Meyer, Paul Ernst |
| Mez, Carl Christian |
| Mianowskiego, Józefa |
| Michaëlis, Hans |
| Michniewicz, Adolf Rudolf |