Surname קלוץ (Klotz 
, קלוץ 
) , in the world, is a common cognomen. The cognomen קלוץ is characteristic of Western Europe, particularly Germany, where it is quite a common surname, Austria, and Switzerland, where it is quite a rare surname. Not in comparison with a country's population, the name is most common in Germany, the United States, and Austria. Much less frequently, קלוץ is the forename as well as the last name.