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Last name Kaimu (Kaimu , 开木 ) , in the entire world, is quite a rare surname. The last name Kaimu is habitual in Namibia, where it is quite a rare surname, Tanzania, and Indonesia, where it is a very rare surname. Not in comparison with a country's population, it is the most numerous in Tanzania, Namibia, and China. Likewise, Kaimu is the forename as well as the last name.