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Around the world, سيجي (Sigi , Seiji , Sigge ) is quite a rare unisex forename. The first name سيجي is habitual in Suriname, where it is quite a common masculine name, Austria, where it is quite a rare mostly masculine, but infrequently girly name, and Albania, where it is quite a rare epicene name. Measured by absolute frequency, it is commonest in Japan, Austria, and Indonesia. Also, سيجي is the last name as well as the forename.
سيجي is also a name for the fictitious and mythical characters: Seiji Amasawa , character in Whisper of the Heart; Seiji Iwaki , the fictional character from Initial D and Sigge , the operatic character in the opera Engelbrekt.