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Family name Kozer (كوزر , Kozer , Козер ) , in the world, is a rare last name. The cognomen Kozer is characteristic of Estonia, where it is quite a rare surname, Czechia, where it is a rare surname, and Ukraine. Measured by absolute frequency, it is commonest in the United States, Ukraine, and Russia. Likewise, Kozer is the forename as well as the last name.