Trần Thái Tông
Trần Hưng Đạo was born as Prince Trần Quốc Tuấn (陳國峻) in 1228 to Prince Trần Liễu, the elder brother of the new child emperor, Trần Thái Tông, after the Trần Dynasty replaced the Lý family in 1225 AD. Some time later, Trần Liễu—the Empress Lý Chiêu Hoàng’s brother-in-law at the time—was forced to defer his own wife (Princess Thuận Thiên) to his younger brother Emperor Thái Tông under pressure from Imperial Regent Trần Thủ Độ to solidify Trần clan’s dynastic stability. The brothers Trần Liễu and Emperor Trần Thái Tông harboured grudges against their uncle Trần Thủ Độ for the forced marital arrangement.