Cognomen Kois (Kois 
) , across the world, is quite a rare last name. The last name Kois is habitual in Slovakia, where it is quite a rare surname, Greece, and Austria, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in the United States, Slovakia, and Poland. Very seldom, Kois is the forename as well as the last name.
| jacenty kois (b. 1790) |
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| wojciech kois UA (b. 1803) |
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aristovoulos kois GR (b. 1869) |
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| valeri kois Estonian politician, EE (b. 1950) |
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| dennis kois American graphic designer |
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| lauren e kois researcher (ORCID 0000-0001-6926-7588) |
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| michelle kois German association football player, DE (b. 1993) |
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