Surname Mahaddin (Mahaddin 
, Махаддин 
, Махяддин ) , in the world, is a rare cognomen. The cognomen Mahaddin is habitual in Azerbaijan, where it is quite a rare surname, Kyrgyzstan, where it is a very rare surname, and Malaysia. Measured by absolute frequency, it is commonest in Azerbaijan, Indonesia, and India. More prevalently, Mahaddin is the forename as well as the last name.