Authors: Henry
- Mazel, Henri 1864-1947
- McCarter, Henry 1864-1942
- McCook, Henry C. (Henry Christopher) 1837-1911
- McCormick, W. H. (William Henry) 1884-1952
- McDougall, Henriette 1817-1886
- Meacham, Henry H. 1834-1879
- Meadowcroft, Wm. H. (William Henry) 1853-
- Meibom, Heinrich 1638-1700
- Meibom, Johann Heinrich 1590-1655
- Meige, Henry 1866-1940
- Meister, Jacques-Henri 1744-1826
- Meller, Henry James -
- Mellin, G. H. (Gustaf Henrik) 1803-1876
- Mencken, H. L. (Henry Louis) 1880-1956
- Mendell, George H. (George Henry) 1831-1902
- Mercer, Henry C. 1856-1930
- Merenmaa, Martti 1896-1972
- Merle d'Aubigné, J. H. (Jean Henri) 1794-1872
- Merriman, Henry Seton 1862-1903
- Merwin, Henry Childs 1853-1929
- Meyer, Henry C. (Henry Coddington) 1844-1935
- Meyer, Henry Herman 1874-1951
- Meyerholz, Charles H. (Charles Henry) 1876-
- Michelant, Henri 1811-1890
- Michels, Matthias Hubertus Henricus 1853-
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