Last name 瓦克 (Wacker 
, Wack , 瓦克 
) , in the world, is a common cognomen. The last name 瓦克 is habitual in Western Europe, particularly Germany, where it is quite a common surname, Switzerland, where it is quite a rare surname, and Austria. Measured by absolute frequency, this name is the most popular in Germany, the United States, and France. Much less frequently, 瓦克 is the forename as well as the last name.