Family name Asier (Asier 
, أسيير, اسيير) , throughout the world, is quite a common last name. The surname Asier is habitual in Spain, where it is quite a common surname, Afghanistan, where it is a rare surname, and Venezuela, where it is a very rare surname. In absolute terms, it is commonest in Spain, Afghanistan, and Egypt. More frequently, Asier is the forename as well as the last name.