Qutuqtu (Chinese: 忽覩都, Mongolian: Хутагт) was the second son of Tolui and Lingqun Khatun (daughter of Kuchlug).
Although Qutuqtu left no male descendants, he had a daughter, Kelmish Agha, who was instrumental in cementing the Yuan-Golden Horde alliance.
Kelmish, married to Saljidai Gurkhan, gave birth to a daughter, Oljai Khatun.
Oljai married Mengu-Timur (a descendant of Jochi) and gave birth to Toqta Khan of the Golden Horde.
Qutuqtu's full-sister, Ile Temür, married Pars Buqa, a grandson of Quduka Beki of the Oirat tribe.