Deng was a state in China during the Spring and Autumn Period in the latter half of the Zhou dynasty, ruled by the Man (曼) family. Deng's exact location is uncertain, but it was situated in one of either modern-day Hubei or Henan provinces.
Supposedly, Shang dynasty king Wu Ding (武丁) (r. 1250–1192 BC) conferred the lands that came to be the state of Deng on his younger brother Zi Man (子曼).
In 678 BC King Wen of the state of Chu conquered the state of Deng. Afterwards its people adopted the surname "Deng" (鄧/邓) in order to preserve their heritage as people of Deng, and this surname is still common in China today (e.g. former paramount leader Deng Xiaoping).