Cognomen ادير (Adair 
, Ader 
, ادير 
) , in the entire world, is a common last name. The last name ادير is characteristic of Estonia, where it is quite a common surname, Jamaica, where it is quite a rare surname, and the United States. Not in comparison with a country's population, it most frequently occurs in the United States, the United Kingdom, and Ethiopia. Likewise, ادير is the forename as well as the last name.