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Surname Trier (Tria , Try , Trier ) , around the globe, is a common cognomen. The family name Trier is habitual in Denmark, where it is quite a common surname, Philippines, where it is quite a rare surname, and Indonesia. Not in comparison with a country's population, this name is the most popular in Indonesia, Philippines, and Germany. Likewise, Trier is the forename as well as the last name.