Others
- William Barber (engraver) (1807–1879), Chief Engraver of the United States Mint
- Sir William Barber, 1st Baronet (1860–1927), English solicitor, property developer and philanthropist
- William E. Barber (1919–2002), United States Marine Corps colonel and Korean War recipient of the Medal of Honor
- William D. Barber (born 1949), American camera operator and cinematographer
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