What is surname jiang?

Jiang (蒋/江) is a common Chinese surname that originated from the ancient state of Wu during the Spring and Autumn Period. It is the 16th most common Chinese surname and the 4th most common surname in Mainland China. The surname has various meanings, including "river" or "to encourage". It is also an uncommon surname in Korea, where it is spelled 강 (Gang). Famous people with the surname Jiang include Jiang Zemin, former President of China, and Jiang Qing, wife of Mao Zedong.