Surname Куэн (Coin 
, Khuen 
, Куэн) , all over the world, is a common last name. The last name Куэн is characteristic of Malaysia, where it is quite a common surname, France, where it is quite a rare surname, and Botswana. Not in comparison with a country's population, this name is the most popular in Malaysia, France, and Italy. Very seldom, Куэн is the forename as well as the last name.