Duke Wu of Lu was a ruler of the State of Lu during the

Western Zhou Dynasty The Western Zhou ( zh, c=, p=Xīzhōu; c. 1045 BC – 771 BC) was a royal dynasty of China and the first half of the Zhou dynasty. It began when King Wu of Zhou overthrew the Shang dynasty at the Battle of Muye and ended when the Quanrong nom ...

. His ancestral name was Ji, and given name Ao. He succeeded his brother, Duke Shen of Lu, as the ninth ruler of Lu. In spring of the ninth year of his reign, he paid a visit to King Xuan of Zhou with his

heir apparent An heir apparent, often shortened to heir, is a person who is first in an order of succession and cannot be displaced from inheriting by the birth of another person; a person who is first in the order of succession but can be displaced by the b ...

Kuo and younger son, Xi. King Xuan appreciated Xi greatly, and despite the objections of his councillor Zhongshan Fu, he decided to intervene and appoint Xi as the heir apparent over his elder brother. In summer, the three returned to Lu, and Duke Wu died shortly after.

Records of the Grand Historian ''Records of the Grand Historian'', also known by its Chinese name ''Shiji'', is a monumental history of China that is the first of China's 24 dynastic histories. The ''Records'' was written in the early 1st century by the ancient Chinese his ...

,Book 33,"欲立戲為魯太子。周之樊仲山父諫宣王曰：「廢長立少，不順；不順，必犯王命；犯王命，必誅之：故出令不可不順也。令之不行，政之不立；行而不順，民將棄上。夫下事上，少事長，所以為順。今天子建諸侯，立其少，是教民逆也。若魯從之，諸侯效之，王命將有所壅；若弗從而誅之，是自誅王命也。誅之亦失，不誅亦失，王其圖之。」宣王弗聽，卒立戲為魯太子。夏，武公歸而卒，戲立，是為懿公。魯懿公"

References

{{Dukes of Lu Monarchs of Lu (state) 9th-century BC Chinese monarchs 816 BC deaths