Abunai (阿布奈; 1635 – May 5, 1675), known as Prince Chahar of the First Rank (察哈尔亲王), was a Mongol prince of clan Borjigin, second son of Ligden Khan.^[1] He opposed Qing influence in his domain and was subsequently placed into house arrest in Shenyang and his son given his title. In 1675 he led the Chahar Mongols joining in the Revolt of the Three Feudatories, but were defeated in battle in April and subsequently killed. Abunai was a direct male-line descendant of Tolui Khan, the youngest of the four sons of Genghis Khan.