Cognomen Darjan (Dozen 
, Darjan 
, Даржан 
) , in the world, is a common family name. The cognomen Darjan is habitual in Japan, where it is quite a common surname, Romania, where it is quite a rare surname, and North Macedonia, where it is a rare surname. In absolute terms, it most frequently occurs in Japan, Indonesia, and Romania. Much less frequently, Darjan is the forename as well as the last name.