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Across the world, สิทธิไกร (สิทธิไกร , Sittikrai , Sitthikrai ) is a rare principally masculine, but very seldom feminine first name. The forename สิทธิไกร is characteristic of South-eastern Asia, particularly Thailand, where it is a rare principally masculine, but very seldom girly name. Also, สิทธิไกร is the last name as well as the forename.