Throughout the world, Billen (比伦 
, Billen 
) is a rare mostly male, but uncommonly female first name. The given name Billen is characteristic of China, where it is a very rare principally male, but very infrequently feminine name, and India, where it is an extremely rare dominantly boy's, but seldom female name. More prevalently, Billen is the last name as well as the forename.