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Last name Wacha (Wacha , ワカ , Вака ) , globally, is quite a common family name. The cognomen Wacha is habitual in British Virgin Islands, where it is quite a common surname, Japan, where it is quite a rare surname, and Austria. Measured by absolute frequency, it is the most numerous in Japan, the United States, and Uganda. Much less frequently, Wacha is the forename as well as the last name.