Cognomen 敦克 (敦克 
, Duncker 
) , in the entire world, is quite a rare surname. The cognomen 敦克 is habitual in Belize, where it is quite a common surname, Finland, where it is quite a rare surname, and Germany, where it is a rare surname. In absolute terms, it most frequently occurs in Germany, the United States, and Netherlands. Much less frequently, 敦克 is the forename as well as the last name.