Cognomen Kewney (Kewney 
) , in the entire world, is a very rare family name. The family name Kewney is characteristic of the United Kingdom, where it is a very rare surname, South Africa, and the United States, where it is an extremely rare surname. Much less frequently, Kewney is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kewney | United Kingdom, South Africa, United States, Brazil |
| arthur vaux kewney Australian horse-racing official (b. 1873) |
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| alf kewney rugby union player (1882-1959), GB (b. 1882) |
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| guy kewney Journalist, author (1946-2010), ZA (b. 1946) |
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| lester kewney college basketball player (1959–1960) Iowa |
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| iona kewney GB |
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