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Cognomen Didar (Didar , Дидар , ديدار ) , in all the world, is a common surname. The cognomen Didar is characteristic of Western Asia, particularly Oman, where it is quite a common surname, Qatar, and United Arab Emirates, where it is quite a rare surname. Measured by absolute frequency, this name is the most popular in Bangladesh, Iran, and Oman. Also, Didar is the forename as well as the last name.