Family name シャク (シャク 
, Schack 
) , all around the world, is quite a common cognomen. The last name シャク is characteristic of Denmark, where it is quite a common surname, Germany, where it is quite a rare surname, and Austria. Measured by absolute frequency, it is the most numerous in Germany, the United States, and Denmark. Very seldom, シャク is the forename as well as the last name.