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Family name 計 (Kai , Jì , 計 ) , in the world, is a common cognomen. The surname 計 is habitual in Malaysia, where it is a common surname, Macao, where it is quite a common surname, and Lebanon (explore the name in all countries). Not in comparison with a country's population, it is the most numerous in Malaysia, China, and Myanmar. Also, 計 is the forename as well as the last name.