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Surname Kioko (Kioko ) , in all the world, is a common cognomen. The last name Kioko is habitual in Kenya, where it is a common surname, Botswana, where it is quite a rare surname, and Qatar. In absolute terms, this name is the most popular in Sub-Saharan Africa, particularly Kenya, Uganda, and Tanzania. Much less frequently, Kioko is the forename as well as the last name.