Cognomen ديا (Dea 
, Dia 
, ديا 
) , all over the world, is a widespread last name. The cognomen ديا is habitual in Senegal, where it is a common surname, Mauritania, and Lebanon, where it is quite a common surname (explore the name in all countries). Measured by absolute frequency, it is commonest in Senegal, Indonesia, and Algeria. Also, ديا is the forename as well as the last name.