Surname Kleren (Klerin 
, Kleren 
) , in the world, is a very rare family name. The surname Kleren is characteristic of Luxembourg, where it is quite a rare surname, Germany, where it is a very rare surname, and Honduras. Not in comparison with a country's population, it is commonest in Germany, Luxembourg, and the United States. Also, Kleren is the forename as well as the last name.