Cognomen Billy (Billy 
, بيلي 
, 比利 
, among others...) , throughout the world, is a common surname. The family name Billy is habitual in Solomon Islands, where it is quite a common surname, Reunion, and Saint Lucia (explore the name in all countries). In absolute terms, it is commonest in Indonesia, France, and Nigeria. More prevalently, Billy is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Billy | Philippines, Kenya, United States, Indonesia, Democratic Republic of the Congo |
| بيلي | Iraq, Egypt, Sudan, Saudi Arabia, Algeria |
| 比利 | China |
| ビリー | Japan |
| בילי | Israel |
| Билли | Kazakhstan, Russia |
| nicolas joachim billy French politician, FR (b. 1748) |
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| nicolas antoine labbey de billy (b. 1753) |
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louis-adolphe billy Canadian politician (1834-1907), CA (b. 1834) |
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andré billy French football manager (1876-1913), FR (b. 1876) |
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| eugène billy French politician, FR (b. 1830) |
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| marius billy French lawyer, FR (b. 1877) |
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| susan santiago billy Native American Pomo basket weaver (b. 1884) |
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chuck billy American vocalist, US (b. 1962) |
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bertrand de billy French conductor, FR (b. 1965) |
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| abel billy FR (b. 1909) |
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bonnie "prince" billy American singer-songwriter and actor, US (b. 1970) |
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| françois billy French botanist, FR (b. 1920) |
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| alfred billy Austrian university teacher, AT (b. 1920) |
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| jacques billy French official and writer, FR (b. 1921) |
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ismaël billy French poet, FR (b. 1987) |
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Cox, Parker, Rogers, Taylor, Thomas, Turner, Harris, Walker, Wilson, Wright, Sanders, Stewart, Collins, Roberts, Jackson, Johnson, Edwards, Mitchell, Anderson, Campbell, Phillips, Robinson, Carter, Miller, Morris, Martin, Bob, Lee, Joe, King, Hall, Hill, Moore, Scott, Smith, Allen, Thompson, Adams, Baker, Brown, Davis, Green, Lewis, James, Jones, Evans, White, Young, Clark, and Williams