Last name Aju (Aju 
, อาจู 
, Ajú 
) , all over the world, is a common cognomen. The last name Aju is habitual in Guatemala, where it is quite a common surname, United Arab Emirates, where it is quite a rare surname, and Qatar. Measured by absolute frequency, it most frequently occurs in Guatemala, Nigeria, and India. More prevalently, Aju is the forename as well as the last name.