Cognomen Дюкс (Dux 
, Dukes 
, Дюкс 
) , in all the world, is a common surname. The cognomen Дюкс is habitual in Isle of Man, where it is quite a common surname, the United States, where it is quite a rare surname, and Namibia. Not in comparison with a country's population, it most frequently occurs in the United States, the United Kingdom, and Germany. Much less frequently, Дюкс is the forename as well as the last name.