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Family name Ramanan (Ramanan , രമണൻ) , in the world, is quite a common last name. The surname Ramanan is habitual in Sri Lanka, where it is quite a common surname, United Arab Emirates, where it is quite a rare surname, and Qatar. Measured by absolute frequency, it is commonest in India, Sri Lanka, and United Arab Emirates. More frequently, Ramanan is the forename as well as the last name.