In the world, וסלין (Veselin 
, Weselin 
, וסלין 
) is quite a common boy's first name. The given name וסלין is characteristic of Bulgaria, where it is quite a common boy's name, Montenegro, and Bosnia and Herzegovina, where it is quite a rare boy's name. Not in comparison with a country's population, this name is the most popular in Bulgaria, Greece, and Serbia. Much less frequently, וסלין is the last name as well as the forename.