Cognomen トルン (Torun 
, トルン, Törn 
) , across the world, is a common surname. The surname トルン is habitual in Turkey, where it is quite a common surname, Sweden, where it is quite a rare surname, and Cyprus. In absolute terms, the name is most common in Turkey, Bangladesh, and Germany. Very seldom, トルン is the forename as well as the last name.