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In the world, Sitthichai (สิทธิชัย , Sitthichai , สิทธิไชย ) is a common principally masculine, but very infrequently female forename. The given name Sitthichai is characteristic of South-eastern Asia, particularly Thailand, where it is quite a common principally masculine, but scarcely female name. Much less frequently, Sitthichai is the last name as well as the forename.