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Family name Doull (دول , 道尔 , Doull ) , in the entire world, is quite a rare last name. The cognomen Doull is habitual in Sudan, where it is quite a rare surname, New Zealand, where it is a rare surname, and Libya. In absolute terms, it is the most numerous in Sudan, Egypt, and the United Kingdom. Very seldom, Doull is the forename as well as the last name.