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Cognomen Diwana (Diwana ) , throughout the world, is quite a rare family name. The surname Diwana is characteristic of Western Asia, particularly Qatar, where it is quite a common surname, Saudi Arabia, where it is quite a rare surname, and United Arab Emirates. Measured by absolute frequency, it is the most numerous in Saudi Arabia, Qatar, and India. Much less frequently, Diwana is the forename as well as the last name.