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Cognomen Fergani (Fergani , فرقانی , فرقاني ) , throughout the world, is a common last name. The family name Fergani is habitual in Iran, where it is quite a rare surname, Algeria, and Oman. Measured by absolute frequency, the name is most common in Iran, Algeria, and France. Much less frequently, Fergani is the forename as well as the last name.