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Cognomen Хаилонг (Hailong , Хаилонг , Khailong ) , throughout the world, is a rare family name. The cognomen Хаилонг is habitual in Taiwan, where it is a rare surname, Czechia, and Malaysia. Measured by absolute frequency, it most frequently occurs in China, Taiwan, and Malaysia. Much more prevalently, Хаилонг is the forename as well as the last name.