Family name Koskei (Koskei 
) , around the globe, is quite a common surname. The surname Koskei is characteristic of Kenya, where it is quite a common surname, the United States, where it is an extremely rare surname, and India. Much less frequently, Koskei is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Koskei | Norway, Kenya, Spain, India, United States |
| william koskei Ugandan-Kenyan hurdler and sprinter, KE (b. 1947) |
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| kipsubai koskei Kenyan athletics competitor, KE (b. 1951) |
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| sammy koskei Kenyan distance runner, KE (b. 1961) |
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| felix koskei Kenyan politician, KE (b. 1964) |
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| james koskei Kenyan distance runner, KE (b. 1968) |
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| christopher koskei Kenyan distance runner, KE (b. 1974) |
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| dominic kipkoech koskei Kenyan politician, KE |
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| peter koskei researcher |
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| hellen cherono koskei Kenyan long-distance runner (b. 1984) |
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Mr, Sammy, Simon, Susan, Alice, Allan, Carol, Betty, Betsy, Brian, Karen, Kevin, Kibet, Peter, Denis, David, Daisy, Diana, Linus, Loice, Janet, Janny, Sarah, Sally, Mercy, Fred, Ms, Sam, Tim, Eng, Mark, Anne, Abdi, Amos, Csmp, Paul, James, Pius, Lucy, Jane, John, Joan, Joel, June, Tony, Noah, Eric, Ezra, Lily, and Joyce