Family name Kosgei (Kosgei 
) , in the entire world, is a common last name. The family name Kosgei is habitual in Kenya, where it is quite a common surname, Qatar, where it is a rare surname, and Australia, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in Kenya, the United States, and Qatar. Much less frequently, Kosgei is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kosgei | Kenya, Australia, Spain, Qatar, United States |
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salina jebet kosgei Kenyan marathon runner, KE (b. 1976) |
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rose kosgei Kenyan long-distance runner, KE (b. 1981) |
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samuel kiplimo kosgei Kenyan distance runner, KE (b. 1986) |
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isaac kosgei KE (b. 1981) |
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cynthia kosgei Kenyan long-distance runner, KE (b. 1993) |
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brigid kosgei Kenyan long-distance runner, KE (b. 1994) |
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| sally kosgei Kenyan politician, KE (b. 1949) |
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| japhet kosgei Kenyan distance runner, KE (b. 1968) |
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| john kosgei Kenyan steeplechase runner ., KE (b. 1973) |
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| joseph kosgei Kenyan distance runner, KE (b. 1974) |
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| irene jerotich kosgei Kenyan marathon runner, KE (b. 1974) |
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| samson kosgei Kenyan athletics competitor, KE (b. 1974) |
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| paul malakwen kosgei Kenyan distance runner, KE (b. 1978) |
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| reuben kosgei athletics competitor, KE (b. 1979) |
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| rose j kosgei researcher |
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Mr, Lucy, Jane, Jack, Jael, John, Joan, Joel, Jean, Jeff, Judy, Tony, Naum, Noah, Elly, Emmy, Hawa, Moses, Mercy, Micah, Sally, Sarah, Dave, Ruth, Rose, Pius, Ms, Sam, Ann, Ben, Ken, Kip, Dan, Joy, Job, Eva, Sammy, Ian, Mark, Mike, Sang, Alex, Anne, Amon, Amos, Boaz, Kenn, Paul, Mary, and Sheri