Family name קלוגה (Kluge 
, קלוגה 
) , all around the world, is a common surname. The cognomen קלוגה is habitual in Germany, where it is quite a common surname, Estonia, where it is quite a rare surname, and Denmark. Measured by absolute frequency, this name is the most popular in Germany, the United States, and Brazil. Much less frequently, קלוגה is the forename as well as the last name.