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Surname Trestian (Trestian , Трестьян ) , in the world, is a rare cognomen. The family name Trestian is habitual in Eastern Europe, particularly Romania, where it is quite a rare surname, Belarus, where it is a rare surname, and Russia, where it is a very rare surname. In absolute terms, the name is most common in Romania, Russia, and Indonesia. Very seldom, Trestian is the forename as well as the last name.