Cognomen Аг (Аг 
) , globally, is a rare last name. The family name Аг is habitual in Armenia, where it is quite a rare surname, Kazakhstan, where it is a rare surname, and Kyrgyzstan, where it is a very rare surname. In absolute terms, it is the most numerous in Kazakhstan, Armenia, and China. Very seldom, Аг is the forename as well as the last name.