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Cognomen Michna (Michna , Михна ) , globally, is quite a common last name. The surname Michna is habitual in Eastern Europe, particularly Slovakia, where it is quite a common surname, Czechia, where it is quite a rare surname, and Bulgaria. Measured by absolute frequency, it is the most numerous in Poland, Czechia, and Germany. Likewise, Michna is the forename as well as the last name.