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Last name Kalas (Kalas , カラス , Калас ) , worldwide, is a common surname. The surname Kalas is habitual in Eastern Europe, particularly Slovakia, where it is quite a common surname, Czechia, where it is quite a rare surname, and Hungary. Measured by absolute frequency, it is commonest in India, Czechia, and the United States. Also, Kalas is the forename as well as the last name.