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Last name Cão (康 , Кан , Cão ) , all over the world, is a prevalent family name. The surname Cão is characteristic of China, where it is a common surname, Kyrgyzstan, where it is quite a common surname, and Azerbaijan, where it is quite a rare surname. In absolute terms, it is commonest in China, Uzbekistan, and Kyrgyzstan. Very seldom, Cão is the forename as well as the last name.