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Family name Klass (Klass
, كلاس
, 克拉斯
) , in all the world, is quite a common surname. The last name Klass is habitual in Lesotho, where it is quite a common surname, Syria, where it is quite a rare surname, and Germany. Measured by absolute frequency, this name is the most popular in Germany, the United States, and Lesotho. Very seldom, Klass is the forename as well as the last name.