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Surname Yav (Yav , ياف) , globally, is quite a rare family name. The surname Yav is habitual in the Democratic Republic of the Congo, where it is quite a rare surname, the Republic of the Congo, and Belgium, where it is a rare surname. Not in comparison with a country's population, it is commonest in the Democratic Republic of the Congo, India, and the Republic of the Congo. Much less frequently, Yav is the forename as well as the last name.