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Family name Kadlec (Kadlec , Кадлец , Кадлець ) , in the entire world, is a common cognomen. The surname Kadlec is habitual in Czechia, where it is quite a common surname, Slovakia, and Austria, where it is quite a rare surname. Measured by absolute frequency, the name is most common in Czechia, the United States, and Slovakia. Much less frequently, Kadlec is the forename as well as the last name.