Duke Ai of Qin

Duke Ai of Qin (, died 501 BC), personal name unknown, was a duke of the state of Qin during the Spring and Autumn era and Eastern Zhou dynasty. Duke Ai succeeded his father Duke Jing, who died in 537 BC, as ruler of Qin.

Marriage with Chu In 523 BC, Duke Ai betrothed his daughter Bo Ying to Crown Prince Jian of the state of Chu, Qin's ally at the time. Prince Jian's father, King Ping of Chu, sent the minister Fei Wuji to escort the princess to Chu. However, Fei Wuji saw that the princess was beautiful and persuaded King Ping to take her as his own wife. Prince Jian fled abroad and was later killed. Bo Ying later bore King Ping a son, who in 515 BC ascended the Chu throne, to be known as King Zhao of Chu.

Fighting Wu to help Chu In 506 BC, King Helü of the State of Wu invaded Chu, decisively defeated the Chu army at the Battle of Boju, and captured the Chu capital Ying. King Zhao of Chu escaped to the State of Sui.

Death and succession In 501 BC, Duke Ai died after reigning for 36 years. His son predeceased him and was given the posthumous title of Duke Yi (秦夷公). Duke Ai was succeeded by Duke Yi's son, his grandson Duke Hui I of Qin.