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Family name פופר (Popper , פופר ) , all around the world, is quite a rare cognomen. The surname פופר is characteristic of Belize, where it is quite a common surname, Czechia, where it is quite a rare surname, and Israel. Measured by absolute frequency, it is the most numerous in the United States, Czechia, and Israel. Very seldom, פופר is the forename as well as the last name.