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Cognomen Kesy (Kesy , 凯西 , 凱西 ) , in all the world, is quite a rare surname. The family name Kesy is habitual in Poland, where it is quite a rare surname, Estonia, where it is a rare surname, and Tanzania. Not in comparison with a country's population, it is the most numerous in Poland, China, and Tanzania. More prevalently, Kesy is the forename as well as the last name.