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Throughout the world, Sithu (Sithu ) is a common principally male, but scarcely female forename. The first name Sithu is habitual in Mongolia, where it is a widespread masculine name, Myanmar, where it is quite a rare male name, and Qatar, where it is a rare boy's name. Measured by absolute frequency, it is commonest in Mongolia, India, and Myanmar. Much less frequently, Sithu is the last name as well as the forename.