Family name كوجين (Coghen 
, كوجين 
, Cogen 
) , in all the world, is a rare cognomen. The cognomen كوجين is characteristic of Belgium, where it is quite a rare surname, France, where it is a rare surname, and Poland. Not in comparison with a country's population, this name is the most popular in the United States, France, and Belgium. Very seldom, كوجين is the forename as well as the last name.