- Dewey, Melvil Dewey, Melville Louis Kossuth Dewey - United States librarian who founded the decimal system of classification (1851-1931)
--1 is a kind of librarian, bibliothec
- Dewey, George Dewey, Admiral Dewey - a United States naval officer remembered for his victory at Manila Bay in the Spanish-American War
--2 is a kind of naval officer
- Dewey, John Dewey - United States pragmatic philosopher who advocated progressive education (1859-1952)
--3 is a kind of philosopher; educator, pedagogue