 In 1306, he gave his daughter, Princess Huyen Tran, in marriage to the Champa king Jaya Simhavarman III, in return for two Cham provinces.Trần Nhân Tông married Princess Khâm Từ, later Empress Consort Khâm Từ Bảo Thánh, the eldest daughter of Grand Prince Hưng Đạo Trần Quốc Tuấn, in December 1274 when he was entitled as crown prince.Trần Nhân Tông had his first son, Trần Thuyên, on September 17 of lunar calendar, 1276, Trần Thuyên eventually became Nhân Tông's successor as Trần Anh Tông.