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Family name Kohy (Kohy ) , throughout the world, is a very rare cognomen. The cognomen Kohy is habitual in Czechia, where it is a rare surname, Iran, where it is a very rare surname, and the United States, where it is an extremely rare surname. Measured by absolute frequency, it most frequently occurs in Iran, Czechia, and China. Very seldom, Kohy is the forename as well as the last name.