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Last name כהנא (Kahana , Kahane , כהנא ) , in all the world, is a common family name. The surname כהנא is habitual in Israel, where it is quite a common surname, Namibia, where it is quite a rare surname, and Laos. Measured by absolute frequency, it most frequently occurs in India, Israel, and the United States. Very seldom, כהנא is the forename as well as the last name.