Cognomen Райо (Rayo 
, Raio 
, Райо 
) , worldwide, is a common last name. The family name Райо is habitual in Latin America and the Caribbean, particularly Nicaragua, where it is a common surname, Colombia, where it is quite a common surname, and Costa Rica, where it is quite a rare surname. Not in comparison with a country's population, it is the most numerous in Latin America and the Caribbean, particularly Nicaragua, Mexico, and Colombia. Much less frequently, Райо is the forename as well as the last name.