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Surname Buen (Bonus , Buen , Буен ) , globally, is a common cognomen. The surname Buen is habitual in Philippines, where it is quite a common surname, Norway, where it is quite a rare surname, and United Arab Emirates. Measured by absolute frequency, it most frequently occurs in Philippines, the United States, and Germany. Very seldom, Buen is the forename as well as the last name.