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Last name พิสิฐกุล (พิสิฐกุล , Bhisitkul , Pisithkul ) , throughout the world, is a very rare family name. The surname พิสิฐกุล is habitual in Thailand, where it is a very rare surname, and the United States, where it is an extremely rare surname. Much less frequently, พิสิฐกุล is the forename as well as the last name.