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Surname Prochaska (Prochaska , Procházka , Прохазка ) , worldwide, is a common last name. The last name Prochaska is characteristic of Czechia, where it is quite a common surname, Slovakia, where it is quite a rare surname, and Austria. Not in comparison with a country's population, the name is most common in Czechia, the United States, and Germany. Much less frequently, Prochaska is the forename as well as the last name.