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Wèi Huán-zĭ (died 446 BCE) (Chinese: 魏桓子), also known as Wèi Xuān-zi (Chinese: 魏宣子), was a leader of the State of Wei during the Warring States period of Chinese history. Personal name Jū (駒/驹), he was the son of Wèi Xiāng-zǐ.

When Wèi Xiāng-zǐ died, Wèi Huán-zĭ succeeded him as leader of Wei. Together with Zhào Xiāng-zĭ and Hán Kāng-zĭ (simplified Chinese: 韩康子; traditional Chinese: 韓康子), Wèi Huán-zĭ defeated Zhì Bóyáo of the State of Zhi. Afterwards the three allies divided up the Zhi territory and expanded their own state borders making them larger than the other vassal states.

After Wèi Huán-zĭ died, his son Marquess Wen of Wei became the Wei leader.