Family name Tanui (Tanui 
) , across the world, is a common cognomen. The last name Tanui is characteristic of Kenya, where it is quite a common surname, Cameroon, where it is a rare surname, and United Arab Emirates. Measured by absolute frequency, the name is most common in Kenya, Cameroon, and the United States. Very seldom, Tanui is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Tanui | Kenya, United Arab Emirates, Cameroon, United States, India |
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susan tanui American long-distance runner, KE (b. 1987) |
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| william tanui Athletics competitor from Kenya, KE (b. 1964) |
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| moses tanui Kenyan long-distance runner, KE (b. 1965) |
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| james tanui Kenyan athletics competitor (1974-2003), KE (b. 1974) |
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| philip tanui Kenyan athletics competitor, KE (b. 1975) |
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| mark tanui Kenyan athletics competitor, KE (b. 1977) |
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| kelvin tanui Kenyan athlete, KE |
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| hillary k tanui researcher |
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| rose tanui researcher |
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| elisha tanui Kenyan distance runner, KE (b. 1983) |
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| paul tanui Kenyan long-distance runner, KE (b. 1990) |
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| angela tanui (b. 1992) |
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Mr, Leah, Lily, Jane, John, Joan, Joel, Jeff, June, Judy, Tony, Niko, Edna, Eric, Emmy, Ezra, Moses, Mercy, Sally, Sarah, Sammy, Silas, Lawi, Dave, Ruth, Rose, Ms, Ann, Asa, Ken, Job, Nui, Ian, Mary, Mark, Mike, Simon, Saul, Anne, Aron, Abel, Amos, Cate, Boaz, Paul, Pina, Pius, Rael, Alex, and Susan