William Gill
William, Will, Bill, or Billy Gill may refer to:
Arts and entertainment
- William Ward Gill, English painter, brother of Edmund Marriner Gill
- William Henry Gill , Manx composer
- William Gill , American actor and playwright; author of Broadway's first hit musical, Adonis
- William Gill , British photographer
- W. Walter Gill, Manx scholar, folklorist and poet
- Will Gill, Canadian artist
Sports
- Billy Gill, Australian rules footballer
- Bill Gill , Canadian soccer goalkeeper
- William Gill , American boxer
Others
- William Gill , Manx master mariner
- William Wyatt Gill, English missionary
- William Gill , British explorer and intelligence gatherer, companion of William Mesny
- William H. Gill, U.S. Army general
- William Henry Gill , Australian ethnographer
- William Smith Gill, Scottish Volunteer Force officer and paint manufacturer
- William R. Gill, American diplomat