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Surname Doina (Doina , Doïna , Дойна ) , around the world, is a common cognomen. The surname Doina is habitual in Eastern Europe, particularly Romania, where it is quite a common surname, Moldova, and Bulgaria, where it is quite a rare surname. Not in comparison with a country's population, this name is the most popular in Romania, Moldova, and Italy. More prevalently, Doina is the forename as well as the last name.