Family name 克勒 (Kolle 
, Koehler , 克勒 
) , in the world, is a common surname. The family name 克勒 is habitual in Western Europe, particularly Germany, where it is quite a common surname, Austria, and Luxembourg, where it is quite a rare surname. Measured by absolute frequency, it is the most numerous in Germany, the United States, and India. Much less frequently, 克勒 is the forename as well as the last name.