Authors: P
- Hann, Pauline 1855-
- Hansmann, Paul 1882-1936
- Harding, Warren G. (Warren Gamaliel) 1865-1923
- Hardy, Paul 1862-1942
- Harkness, Peter T. -
- Harlan, Byron G. 1861-1936
- Harland, Marion 1830-1922
- Harrison, Benjamin 1833-1901
- Harris, Robert A. (Robert Alan) 1950-
- Harting, Pieter 1812-1885
- Hartley, Percy John 1875-
- Hartmann, Paul 1890-1958
- Hasanayn, Ahmad Muhammad 1889-1946
- Hasebroek, J. P. (Johannes Petrus) 1812-1896
- Haskett Smith, W. P. (Walter Parry) 1859-1946
- Hasluck, Paul N. (Paul Nooncree) 1854-1931
- Hatch, David Patterson (Spirit) 1846-1912
- Haussonville, comte d' 1843-1924
- Hawks, Francis L. (Francis Lister) 1798-1866
- Haworth, Paul Leland 1876-1936
- Hawthorne, Paul -
- Hayes, Rutherford Birchard 1822-1893
- Haynes, E. S. P. (Edmund Sidney Pollock) 1877-1949
- Hay, Oliver Perry 1846-1930
- Hazard, Willis P. (Willis Pope) 1825-1913
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