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Last name Kakai (Kakai ) , throughout the world, is quite a common family name. The family name Kakai is habitual in Solomon Islands, where it is quite a common surname, Kenya, where it is quite a rare surname, and Uganda. Not in comparison with a country's population, it is the most numerous in Sub-Saharan Africa, particularly Kenya, Uganda, and Tanzania. Much less frequently, Kakai is the forename as well as the last name.