Surname Kelby (Kelby 
) , in the world, is a rare family name. The family name Kelby is characteristic of Malaysia, where it is a rare surname, the United Kingdom, and Honduras, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in Malaysia, the United States, and the United Kingdom. More frequently, Kelby is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kelby | Canada, Dominican Republic, United Kingdom, United States, Malaysia |
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robert hendre kelby born 1847; died 1927; librarian, New-York Historical Society, US (b. 1847) |
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scott kelby American photographer and writer, US (b. 1960) |
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| nicole m. kelby (b. 1957) |
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| john kelby English Member of Parliament |
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Cox, Steele, Carter, Barnes, Taylor, Thomas, Nelson, Harris, Howell, Hughes, Walker, Wilson, Jackson, Johnson, Sullivan, Stephens, Anderson, Chambers, Peterson, Phillips, Robinson, Thompson, Miller, Morgan, Morris, Martin, Lee, Cook, Berg, King, Reed, Moore, Smith, Allen, Adams, Clark, Williams, Brown, Price, Davis, Dixon, Green, Lewis, James, Jones, Olson, White, Young, Kraft, and Velasquez