Liu Yu (; died 128 BC1st year of the Yuan'shuo era. The year corresponds to 21 Nov 129 BC to 10 Nov 128 BC in the proleptic Julian calendar.) was a prince of the Western Han dynasty. He was the fifth son of Emperor Jing. His mother was Consort Cheng (程妃). In 155 BC he was instated as Prince of Huaiyang (淮陽王), but a year later his title was later changed to Prince of Lu (魯王).
Descendants Liu Yu's descendants included the Three Kingdoms era warlords Liu Biao and Liu Yan, Liu Biao's sons Liu Qi and Liu Cong, and Liu Yan's son Liu Zhang.
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