Gongsun Yue

Gongsun Yue (rōmaji: Kōson Etsu) is the cousin of Gongsun Zan. When Gongsun Zan and Yuan Shu allied together, Gongsun Zan sent him to aid Yuan Shu, who was under attack from his own half-brother, Yuan Shao. Gongsun Yue was ordered by Yuan Shu to help Sun Jian retake Yangcheng from Zhou Ang, but he was killed by a stray arrow during the attack. Gongsun Zan blamed Yuan Shao for Gongsun Yue's death, and attacked Yuan Shao at the Battle of Jieqiao.

Romance of the Three Kingdoms
In the novel, Gongsun Yue is Gongsun Zan's younger half-brother. In chapter 7, he was sent as a messenger to demand that Yuan Shao split Jizhou with Gongsun Zan, since the two agreed to a two-pronged attack on the province. Yuan Shao told Gongsun Yue to fetch his brother, claiming that they had matters to discuss. On his way home, however, Gongsun Yue was confronted and killed by men claiming to be Dong Zhuo's bodyguards. Gongsun Yue was the assassins' only target, and so his unit safely made it home and reported it to Gongsun Zan, who claimed that Yuan Shao played him false, and so he waged war against Yuan Shao.