Historians, Miscellaneous: Biographies
- Giuseppe Peano
- Haki R. Madhubuti
- Hale Woodruff
- Hans Reichenbach
- Hans Vaihinger
- Harold Washington
- Harrie E. Adams Wilson
- Hassan Hanafi
- Hazel R. OLeary
- Heinrich Seuse
- Henry Sylvester Williams
- Hereward Carrington
- Hiram Rhoades Revels
- Horace R. Cayton
- Howard Thurman
- Hugh Hammond Bennett
- Hydrochlorofluorocarbons
- Imre Lakatos
- Incineration
- Jacob Moleschott