Surname Asain (Asain 
, Асаин 
) , in all the world, is a rare family name. The cognomen Asain is habitual in Saudi Arabia, where it is a rare surname, Malaysia, where it is a very rare surname, and Philippines. In absolute terms, it is commonest in Philippines, Saudi Arabia, and Nigeria. More prevalently, Asain is the forename as well as the last name.