- William Hazlitt *
- William Henry Bragg
- William Henry Davenport Adams
- William Holden
- William Howard Arnold
- William Inge
- William J. H. Boetcker
- William James
- William Jennings Bryan
- William L. Watkinson
- William Lamb, 2nd Viscount Melbourne
- William Lashner
- William Lloyd Garrison
- William Longgood
- William Lyon Phelps
- William M. Winans
- William Makepeace Thackeray
- William Markiewicz
- William Mather Lewis
- William Morris
- William Nevins
- William Osler
- William Penn
- William R. Alger
- William Ralph Inge
- William Rotsler
- William S. Burroughs
- William Safire
- William Saroyan
- William Shakespeare
- William Shakespeare *
- William Strunk Jr.
- William Tecumseh Sherman
- William Temple
- William Thomas Ellis
- William W. Purkey
- William Wharton
- William Wordsworth
- William Wrigley Jr.
- Willie Nelson
- Willie Sutton
- Wilma Askinas
- Wilson Mizner
- Win Borden
- Winston Churchill
- Wolfgang Amadeus Mozart
- Woodrow Wilson
- Woodrow Wyatt
- Woody Allen
- Woody Harrelson