Dou's family originated from Si's family, which is a surname of Han nationality in China. Mainly distributed in Henan and Hebei. Dou's surname, originated from Ji's surname, came from the early Western Zhou Dynasty, and belongs to the surname with the ancestor's name, so Dou and Dou are not the same surname.

The origin of Dou's family is ancient, and its distant ancestor began in Xia Dynasty. Is a descendant of Dayu. Originated from the Yu family. After the Xia monarch was killed, the princess escaped from the sinus and returned to her family, giving birth to a posthumous child, Shao Kang. Later, Shao Kang restored the Xia Dynasty, which was called "Shao Kang Zhongxing" in history. Shao Kang's two sons, Zhu and Long, still live in Youliang, so they take Dou as their surname. Later, he ascended the throne and became the next king of Xia.