Cognomen Kariuki (Kariuki 
, كاريوكي 
, Кариуки 
) , all around the world, is a widespread family name. The surname Kariuki is characteristic of Kenya, where it is a common surname, United Arab Emirates, where it is quite a rare surname, and Qatar. Not in comparison with a country's population, this name is the most popular in Kenya, Egypt, and the United States. Much less frequently, Kariuki is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Kariuki | United Arab Emirates, Uganda, United States, Kenya, Tanzania |
| كاريوكي | Iraq, Egypt, Sudan |
| Кариуки | Russia |
| obadiah kariuki (b. 1902) |
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thomas kariuki biologist (b. 1962), KE (b. 1962) |
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| josiah mwangi kariuki Kenyan politician (1929-1975), KE (b. 1929) |
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simon njoroge kariuki Kenyan athletics competitor, KE (b. 1980) |
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| godfrey gitahi kariuki Kenyan politician, KE (b. 1938) |
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| rafiki kariuki Jamaican visual artist, JM (b. 1951) |
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| paul kihara kariuki Kenyan lawyer (b. 1954) |
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| kellen kariuki Accountant, businesswoman and corporate executive in Kenya, KE (b. 1960) |
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| julius kariuki Athletics competitor from Kenya, KE (b. 1961) |
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| peter kihara kariuki (b. 1954) |
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| susan kariuki Kenyan basketball player (1966-), KE (b. 1966) |
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| john kariuki Kenyan athletics competitor, KE (b. 1969) |
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| isaac kariuki Kenyan athletics competitor, KE (b. 1973) |
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| carole kariuki Kenyn businesswomen (born 1975), KE (b. 1975) |
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| david kariuki Kenyan athletics competitor, KE (b. 1976) |
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