Last name origins & meanings:

  1. Chinese: from the name of a state that existed during the Zhou dynasty (in present-day Shaanxi province). When the second king of the Zhou dynasty, Cheng Wang (1115–1079 bc), defeated the state of Tang in present-day Shaanxi province, he changed its name to Du and granted it to a descendant of the model emperor Yao. Descendants of the new ruler subsequently adopted the place name as their surname.
  2. Chinese: from the names of two princes of ancient territories, one from the state of Qi, and the other from the state of Zhen.
  3. Vietnamese (D{us}): unexplained.
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