Family name Lagat (Lagat 
) , worldwide, is a common last name. The family name Lagat is habitual in Kenya, where it is quite a common surname, Philippines, where it is quite a rare surname, and Qatar, where it is a rare surname. Measured by absolute frequency, it is the most numerous in Kenya, Philippines, and India. Very seldom, Lagat is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Lagat | Philippines, India, France, United States, Kenya |
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bernard lagat Kenyan-born track runner competing for United States, US (b. 1974) |
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viola cheptoo lagat Kenyan middle-distance runner, KE (b. 1989) |
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| pascal lagat French swimmer, FR (b. 1960) |
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| elijah lagat athletics competitor, KE (b. 1966) |
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| francis tarar lagat politician in Kenya |
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| silas lagat researcher (ORCID 0000-0003-0168-8073) |
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| joseph lagat Kenyan athletics competitor, KE (b. 1986) |
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| walter lagat |
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| cosmas kiplimo lagat Kenyan male marathon runner, KE (b. 1995) |
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| cleophas lagat politician |
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| justus lagat (b. 1996) |
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| lydia jeruto lagat |
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