Cognomen Диаш (Dias 
, Диаш 
) , throughout the world, is a prevalent family name. The last name Диаш is characteristic of Portugal, where it is a prevalent surname, Cabo Verde, where it is a widespread surname, and Brazil, where it is a common surname (explore the name in all countries). In absolute terms, it is the most numerous in Brazil, Portugal, and Sri Lanka. Much less frequently, Диаш is the forename as well as the last name.