Cognomen 卡勒 (Kalle 
, Kaler 
, Karrer 
) , around the world, is a common family name. The cognomen 卡勒 is characteristic of Estonia, where it is quite a common surname, Switzerland, and Austria. Not in comparison with a country's population, it most frequently occurs in India, Germany, and Indonesia. Likewise, 卡勒 is the forename as well as the last name.