Trần Thánh Tông
Trần Nhân Tông was born on November 11 of the lunar calendar 1258 as Trần Khâm, the first son of the Emperor Trần Thánh Tông, who had been ceded the throne by Trần Thái Tông for only eight months, and Empress Thiên Cảm Trần Thị Thiều. It was said that the newborn Trần Khâm was so fine that his grandfather Thái Tông and father Thánh Tông named him as Kim Tiên đồng tử (Pupil of the Heavenly Kim Tiên). Prince Trần Khâm was entitled as Crown Prince of the Trần dynasty in December 1274, he had a younger brother, Prince Tá Thiên Trần Đức Việp (born in 1265) and an elder sister, Princess Thiên Thụy, who would die on the same day as her brother Nhân Tông. Always concerned with the education of his son, in 1274, Trần Thánh Tông appointed the prominent mandarin and general Lê Phụ Trần in the position of the crown prince's professor with two famous scholars Nguyễn Sĩ Cố and Nguyễn Thánh Huấn as assistants, the Emperor himself also composed poems and a literary work named "Di hậu lục" to educate prince Trần Khâm.