Yuan Yin (onyomi: En In) is Yuan Shu's cousin and one of his administrators. Born in Runan, Ruyang County, Yuan Yin served Yuan Shu sometime after Sun Jian's death. He was appointed Prefect of Danyang, but he was overrun by Sun Ce's forces and fled. When his lord passed away, Yuan Yin became the caretaker for Yuan Shu's remaining wives and daughters and sought shelter under Liu Xun. Yuan Yin's historical whereabouts after Liu Xun's subsequent defeat are unknown.