Others
- William Fowler (makar) (c. 1560–1612), Scottish writer
- William Fowler (Brothertown Indian) (1815 - 1862), first non-white Wisconsin legislator; killed in the U.S. Civil War
- William Weekes Fowler (1849–1923), English entomologist
- William Fowler (Mormon) (1830–1865), Latter-day Saint hymnwriter
- William Alfred Fowler (1911–1995), American astrophysicist
- Wyche Fowler, William Wyche Fowler, Jr.
- William Fowler, A fictional character (referred to as Agent Fowler) in the CGI animated series, Transformers: Prime.
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