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Last name Kaluza (Kaluza , Kaluža , Kałuża ) , in all the world, is quite a common surname. The family name Kaluza is habitual in Slovenia, where it is quite a common surname, Poland, and Czechia, where it is quite a rare surname. Measured by absolute frequency, it most frequently occurs in Poland, Germany, and the United States. Also, Kaluza is the forename as well as the last name.