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Across the world, 希古 (Sigurd , 希古) is quite a common male given name. The given name 希古 is characteristic of Norway, where it is quite a common male name, Sweden, where it is quite a rare masculine name, and Germany. Very seldom, 希古 is the last name as well as the forename.
希古 is also a name for the fictitious and mythical characters: Førstebetjent Sigurd Helmer , character in Nitimemordet; Sigurd of Vanaheim , the fictional character, Conan the Buccaneer and Sigurd , the operatic character in the opera Sigurd by Ernest Reyer; Frankish hero.