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Surname Liai (丽爱 , 立爱 , Liai ) , throughout the world, is a rare family name. The cognomen Liai is characteristic of South Sudan, where it is quite a rare surname, New Zealand, where it is a rare surname, and China, where it is a very rare surname. Measured by absolute frequency, it most frequently occurs in China, South Sudan, and Argentina. More frequently, Liai is the forename as well as the last name.