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Cognomen Siang (Siang , เสี่ยง, เซี่ยง) , around the globe, is a common family name. The last name Siang is characteristic of South-eastern Asia, particularly Malaysia, where it is a common surname, Brunei, where it is quite a common surname, and Singapore. In absolute terms, it is the most numerous in South-eastern Asia, particularly Malaysia, Indonesia, and Myanmar. Very seldom, Siang is the forename as well as the last name.