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Surname Kaile (凯乐 , Kaile , 开乐 ) , globally, is quite a rare last name. The last name Kaile is habitual in Papua New Guinea, where it is quite a rare surname, India, where it is a rare surname, and Finland, where it is a very rare surname. Measured by absolute frequency, it is the most numerous in India, China, and Papua New Guinea. More prevalently, Kaile is the forename as well as the last name.