William or Bill Mayer may refer to:Bill Mayer, American illustrator William Mayer (composer) (1925–2017), American composer William A. Mayer, American polo player William Daniel Mayer (1941–2026), former member of the Maryland House of Delegates William E. Mayer, investment banker and former owner of the Hartford Colonials William V. Mayer (1920–1989), American biologist and educator

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