Yuan Zhao

Yuan Zhao (元釗) (526 – May 17, 528), also known in history as Youzhu (幼主, literally "the young lord"), was briefly an emperor of the Xianbei dynasty Northern Wei.
Background.
Yuan Zhao was a son of Yuan Baohui (元寶暉) the Prince of Lintao, who was a grandson of Emperor Xiaowen and therefore cousin to Emperor Xiaoming, the reigning emperor at the time of Yuan Zhao's birth in 526.
Reign.
In 528, Emperor Xiaoming was poisoned to death by his mother Empress Dowager Hu after trying to curb her power and trying to kill her lover Zheng Yan (鄭儼). Emperor Xiaoming was sonless, and while Empress Dowager Hu initially tried to pretend that Emperor Xiaoming's daughter, by his concubine Consort Pan, was actually a son, she soon realized that she could not carry on the deception, and she named Yuan Zhao emperor—selecting him due to his young age so that she could control him.
The general Erzhu Rong, with whom Emperor Xiaoming had conspired against Empress Dowager Hu, refused to recognize Yuan Zhao as emperor, quickly descending on the capital Luoyang with his troops and declaring a son of Emperor Xiaowen's brother Yuan Xie, Yuan Ziyou, emperor (as Emperor Xiaozhuang). Less than two months after Yuan Zhao was declared emperor, Erzhu had captured Luoyang and put Empress Dowager Hu and Yuan Zhao under arrest. After Empress Dowager Hu tried, unsuccessfully, to defend her actions before Erzhu, Erzhu had her and Yuan Zhao thrown into the Yellow River to drown.
Legacy.
Traditional historians treat Yuan Zhao ambiguously, and subsequent Northern Wei emperors never explicitly officially declared whether he was an emperor or not. He was not given an imperial posthumous name or temple name, but neither was his imperial status declared null. The official history of Northern Wei, the "Book of Wei", written during the succeeding Northern Qi, did not list Yuan Zhao in its imperial biographies (and indeed, did not have a biography for him or his father at all), listing the events during his brief reign under the biography of Emperor Xiaoming, but used the term "beng" (崩) to describe his death, a term reserved for the deaths of emperors and empresses.