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Surname Ranka (Ranka , Ранка , ランカ ) , in all the world, is a common last name. The cognomen Ranka is habitual in Latvia, where it is quite a rare surname, Bosnia and Herzegovina, and Botswana. Not in comparison with a country's population, it is commonest in India, Japan, and Bosnia and Herzegovina. Also, Ranka is the forename as well as the last name.