Cognomen Bahaddin (Bahaddin 
, Бахаддин 
) , in the entire world, is a rare surname. The family name Bahaddin is habitual in Iraq, where it is a rare surname, Georgia, where it is a very rare surname, and Germany, where it is an extremely rare surname. In absolute terms, it is commonest in Iraq, Germany, and India. More frequently, Bahaddin is the forename as well as the last name.