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Surname Bregin (Bregin ) , in all the world, is a rare cognomen. The cognomen Bregin is habitual in Czechia, where it is a rare surname, Israel, where it is a very rare surname, and the United States. Measured by absolute frequency, this name is the most popular in the United States, Indonesia, and Czechia. Likewise, Bregin is the forename as well as the last name.