Cognomen Аджа (Aja 
, Аджа 
) , all around the world, is a widespread last name. The family name Аджа is characteristic of Indonesia, where it is quite a common surname, Brunei, and Nigeria, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in Indonesia, Nigeria, and India. Much less frequently, Аджа is the forename as well as the last name.