: 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.
: from the names of two
princes of ancient territories, one from the state of Qi, and the
other from the state of Zhen. A family tree is the easiest way to start discovering your family history. To begin, just enter whatever you know and we'll use that to try and find more information for you.