Qin may refer to: Dynasties and states Qin (state) (秦), a major state during the Zhou Dynasty of ancient China Qin dynasty (秦), founded by the Qin state in 221 BC and ended in 206 BC Daqin (大秦), ancient Chinese name for the Roman Empire Former Qin (前秦), Di state/Di (Wu Hu) in the Sixteen Kingdoms period, 351 AD Later Qin (后秦), Qiang state in the Sixteen Kingdoms period, 384 AD Western Qin (西秦), Xianbei state in the Sixteen Kingdoms period, 409 AD Geography Qin (秦), another name of Shaanxi province, China Qin County (沁县), in Shanxi province, China Qin River (沁河) in Shanxi, tributary of the Yellow River Qin River (Hebei) (寢水) in Hebei, a former name of the Ming River Other uses Qin (surname) Qin (board game) Qin (Mandaeism), a demon of the Mandaean underworld Qin (Star Wars), a character on the television series The Mandalorian BYD Qin, a car Guqin (古琴), or qin, Chinese stringed musical instrument QIN, an acronym for the Quinault Indian Nation, Native American peoples in the United States qin(), one representation of the functional fourth root of sin() See also Qin Empire (disambiguation)