 Emperor Xiaowen also changed his name to Wuniuyu Deng (勿忸于登).In 496, pursuant to Emperor Xiaowen's edict to change Xianbei names to Han names as part of his sinicization campaign, the Wuniuyu clan's name was changed to Yu.After Emperor Xiaowen's death in 499 and succession by hisson Emperor Xuanwu, Yu Deng's father Yu Lie continued to serve in the administration, and Yu Lie soon ran into conflicts with one of the regents, Emperor Xuanwu's uncle Yuan Xi (元禧) the Prince of Xianyang, over Yuan Xi's arrogance and wastefulness, as well as Yuan Xi's use of items that were supposed to be only usable by the emperor.