Last name Кетен (Кетен 
) , in all the world, is a very rare surname. The cognomen Кетен is habitual in Bulgaria, where it is a rare surname, Kazakhstan, where it is a very rare surname, and Ukraine, where it is an extremely rare surname. In absolute terms, it most frequently occurs in Bulgaria, Kazakhstan, and Russia. Very seldom, Кетен is the forename as well as the last name.