Last name Allien (Alier 
, Allien 
, アレン 
) , across the world, is quite a rare family name. The surname Allien is habitual in South Sudan, where it is quite a rare surname, Haiti, and Nicaragua, where it is a rare surname. Measured by absolute frequency, it most frequently occurs in Japan, South Sudan, and the United States. Likewise, Allien is the forename as well as the last name.