Authors: p
- Hoevenaar, Willem Pieter 1808-1863
- Hofer, Philip 1898-1984
- Hoffmann, Professor 1839-1919
- Hogrefe, Pearl 1889-1977
- Holbach, Paul Henri Thiry, baron d' 1723-1789
- Holland, Philemon 1552-1637
- Hollister, Paul M. (Paul Merrick) 1890-1970
- Hollman, Pierre Jean -
- Holme, Constance 1880-1955
- Holm, Erich 1844-1921
- Holmes, Prescott -
- Holmsen, Bjarne P. (Bjarne Peter) -
- Holt, H. P. -
- Hong, Sheng 1645-1704
- Honoré, Paul 1885-1956
- Hood, Edwin Paxton 1820-1885
- Hooft, P. C. (Pieter Corneliszoon) 1581-1647
- Hoogenhout, P. I. (Petrus Imker) 1884-1970
- Hooker, Mary -
- Hoover, Herbert 1874-1964
- Hopkins, Pauline E. (Pauline Elizabeth) 1859-1930
- Horn, W. O. von 1798-1867
- Horton, Henry P. (Henry Pomeroy) 1869-
- Hoskins, Gayle Porter 1887-1962
- Hoskins, Robert 1933-1993
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