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Yang Yong (Chinese: 楊勇; died August 604[1]), Xianbei name Xiandifa (睍地伐), also known by his posthumous title of Prince of Fangling (房陵王), was a crown prince of Sui dynasty. He was the oldest son of Emperor Wen and Empress Dugu. He drew ire from his parents for wastefulness (which Emperor Wen disliked) and having many concubines (which Empress Dugu disliked), while his younger brother, Yang Guang, whom Emperor Wen and Empress Dugu thought lacked these faults, was favored by them. In 600, Emperor Wen deposed Yang Yong and replaced him with Yang Guang. Subsequently, after Emperor Wen died on 13 August 604[2] (a death that most historians, while acknowledging a lack of conclusive evidence, believed to be a murder ordered by Yang Guang), Yang Guang had Yang Yong put to death.
- ^ Yang Yong was killed between 13 Aug (when his father Emperor Wen died) and 21 Aug 604 (when his brother Yang Guang ascended the throne).
- ^ According to Emperor Wen's biography in Book of Sui, he died on the dingwei day of the 7th month of the 4th year of the Renshou era of his reign. This corresponds to 13 Aug 604 in the Julian calendar. ([仁寿四年秋七月]丁未，崩于大宝殿，时年六十四。) Sui Shu, vol.02