- Dewey, George 1837-1917; U.S. admiral in the Spanish-American War
- Dewey, John 1859-1952; U.S. philosopher & educator: exponent of pragmatism
- Dewey, Melvil (born Melville Louis Kossuth Dewey) 1851-1931; U.S. librarian & educator: originator of a system () for book classification in libraries, using three-digit numbers, further extended beyond a decimal point for subclasses
Used by arrangement with John Wiley & Sons, Inc.
, George 1837-1917.
, John 1859-1952.
, Melvil 1851-1931.
, Thomas Edmund 1902-1971.