| El-Nayal, A. A. |
| Farmer, J. B. |
| Haeckel, Ernst |
| Harmand, L'abbé J. |
| Hidde, C. |
| Lasaulx, Arnold von |
| Lyon, Florence May |
| Lyon, Harold L. |
| Maas, Otto |
| Maassen, Albert |
| Maaßen, Albert |
| Mac Leod, Julius |
| Macchiati, Luigi |
| MacCloskie, George |
| MacDougal, Daniel Trembly |
| Macfarlane, John M. |
| MacLeod, Julius |
| MacMillan, Conway |
| Madaus, Gerhard |
| Mader, M.Fritz |
| Maertens, Karl Heinrich |
| Mägdefrau, Karl |
| Magnin, Ant. |
| Magnin, Antoine |