Cognomen ディア (Dyah 
, Dia 
, Dear ) , throughout the world, is a widespread last name. The family name ディア is characteristic of Senegal, where it is a common surname, Mauritania, and Lebanon, where it is quite a common surname (explore the name in all countries). Not in comparison with a country's population, the name is most common in Senegal, Indonesia, and Algeria. Likewise, ディア is the forename as well as the last name.