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Family name Knoch (诺奇 , Knoch , Кнох ) , all over the world, is quite a common last name. The cognomen Knoch is characteristic of Germany, where it is quite a rare surname, Hungary, where it is a rare surname, and Switzerland. Measured by absolute frequency, it is commonest in Germany, the United States, and Brazil. Much less frequently, Knoch is the forename as well as the last name.