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Throughout the world, シリウス (シリウス , Silius ) is a very rare boy's first name. The given name シリウス is habitual in Tanzania, where it is a very rare masculine name, and India, where it is an extremely rare masculine name. Also, シリウス is the last name as well as the forename.
シリウス is also a name for the fictitious and mythical characters: Silius , the operatic character in the opera Der verführte Claudius.