Cognomen Дилен (Dillen 
, Дилен 
) , in the world, is quite a rare surname. The family name Дилен is characteristic of Belgium, where it is quite a common surname, Netherlands, where it is quite a rare surname, and North Macedonia, where it is a rare surname. In absolute terms, it is commonest in Belgium, Netherlands, and the United States. Very seldom, Дилен is the forename as well as the last name.