Cognomen 阿斯 (阿斯 
, Arrastia 
, Asch 
) , throughout the world, is quite a rare last name. The cognomen 阿斯 is habitual in Belgium, where it is quite a rare surname, Costa Rica, and Netherlands. Measured by absolute frequency, it most frequently occurs in the United States, Germany, and Netherlands. Very seldom, 阿斯 is the forename as well as the last name.