Family name Aq (Aq 
, Ак 
) , in the world, is quite a common cognomen. The family name Aq is habitual in Armenia, where it is quite a common surname, Saudi Arabia, where it is quite a rare surname, and Brunei. Measured by absolute frequency, it is the most numerous in Indonesia, Saudi Arabia, and Bangladesh. Likewise, Aq is the forename as well as the last name.