李惠宗
During the troubled time under the reign of Lý Cao Tông, the Crown Prince Lý Sảm sought refuge in the family of Trần Lý, Trần Thủ Độ's uncle, and decided to marry his beautiful daughter Trần Thị Dung in 1209. Afterward, members of the Trần clan helped Lý Cao Tông and Lý Sảm restore their rule in Thăng Long. As a result, the Emperor appointed several members of the Trần clan to high positions in the royal court: they included Tô Trung Từ, who was uncle of Trần Thị Dung, as well as Trần Tự Khánh and Trần Thừa who were Trần Lý's sons. In 1211 the Crown Prince Lý Sảm was enthroned as Lý Huệ Tông after the death of Lý Cao Tông; the Trần clan's power at court continued to increase. After the death of Trần Tự Khánh in 1223, Trần Thừa was appointed to the highest military position at the royal court, while his cousin Trần Thủ Độ took charge of the royal guard (Vietnamese: Điện tiền chỉ huy sứ).