Viscount Huan of Wei (Chinese: 魏桓子; pinyin: Wèi Huán Zǐ), personal name Wei Ju, was a leader of the Wei clan in the Jin state, where he served as dafu (大夫). He succeeded his father Wei Manduo (Viscount Xiang of Wei) as clan leader.

Viscount Huan of Wei
魏桓子
Leader of Wei clan
PredecessorViscount Xiang
SuccessorMarquess Wen
Died446 BC
IssueMarquess Wen
Names
Ancestral name: (姬)
Lineage name: Wèi (魏)
Given name: Jū (駒)
Posthumous name
Viscount Huan (桓子)
or
Viscount Xuan (宣子)
HouseJi
FatherViscount Xiang (Wei Manduo)

Together with Zhao Wuxu (Viscount Xiang of Zhao) and Han Hu (Viscount Kang of Han), Viscount Huan of Wei defeated Zhi Yao (Viscount Xiang of Zhi). Afterwards the three allies divided up the Zhi (知) territory and expanded their own state borders making them larger than the other states.

After Viscount Huan of Wei died, his son, Marquess Wen of Wei, became the Wei leader.