Ki Cha-o (Korean: 기자오; Hanja: 奇子敖; 1266–1328) was a Goryeo military official and nobleman who is known for being the father of Empress Ki,[1] the primary empress of Toghon Temür (Emperor Huizong) of the Yuan dynasty.
Through Empress Ki, he eventually became the maternal grandfather of Biligtü Khan (Emperor Zhaozong) of the Northern Yuan dynasty.
He was the great-grandson of Ki Yun-suk, who had been the Vice-Director of the Chancellery (문하시랑평장사; 門下侍郎平章事; munhasirang p'yŏngjangsa).
Via the protected appointments system, he was given his first government office as an executive captain (산원; 散員; sanwŏn).
He would later be promoted to Standby Gentleman of the Ministry of War (총부산랑; 摠部散郎; ch'ongbu sanrang).