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Last name Flis (Flis , Fliss , Флис ) , in all the world, is quite a common family name. The surname Flis is characteristic of Slovenia, where it is quite a common surname, Poland, and Tunisia, where it is quite a rare surname. Measured by absolute frequency, the name is most common in Poland, the United States, and Tunisia. Also, Flis is the forename as well as the last name.