Surname 里亚尔 (Rial 
, 里亚尔 
) , across the world, is a common cognomen. The surname 里亚尔 is characteristic of Uruguay, where it is quite a common surname, Argentina, where it is quite a rare surname, and Spain. Not in comparison with a country's population, it is commonest in Argentina, Spain, and Algeria. Very seldom, 里亚尔 is the forename as well as the last name.