Cognomen Телен (Thelen 
, Телен 
) , all around the world, is a common surname. The cognomen Телен is characteristic of Germany, where it is quite a common surname, Luxembourg, where it is quite a rare surname, and the United States. Measured by absolute frequency, it is commonest in Germany, the United States, and Netherlands. Much less frequently, Телен is the forename as well as the last name.