Surname كالس (Cals 
, كالس) , in all the world, is quite a rare family name. The surname كالس is habitual in Western Europe, particularly Netherlands, where it is quite a rare surname, France, where it is a rare surname, and Belgium. Measured by absolute frequency, the name is most common in France, Netherlands, and Brazil. Very seldom, كالس is the forename as well as the last name.