Around the world, Duen (Duen 
, ديوان 
, ดื่น) is a rare mostly masculine, but infrequently girly first name. The first name Duen is characteristic of Belgium, where it is a very rare boy's name, Indonesia, and Philippines, where it is a very rare epicene name. Measured by absolute frequency, it most frequently occurs in Indonesia, the United States, and Nigeria. Also, Duen is the last name as well as the forename.