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All over the world, Sithi (สิทธิ , Sithi , ศิถี ) is quite a rare epicene forename. The given name Sithi is habitual in Thailand, where it is quite a rare predominantly masculine, but very seldom feminine name, Singapore, where it is a rare girly name, and Bangladesh. Measured by absolute frequency, this name is the most popular in Thailand, India, and Bangladesh. Likewise, Sithi is the last name as well as the forename.