Nguyễn Phúc Miên Bửu
Nguyễn Phúc Miên Bửu( 30 May 1820 – 8 March 1854) was a prince of Nguyễn dynasty, Vietnam.
He was the twelfth son of Minh Mạng, and his mother was Hồ Thị Tùy.
In 1843, he was granted the title Tương An Công( 襄安公," Duke of Tương An") by Emperor Thiệu Trị, and became the teacher of two princes, Nguyễn Phúc Hồng Bảo and Nguyễn Phúc Hồng Nhậm( later Emperor Tự Đức).
Hồng Bảo disliked studying, so Thiệu Trị did not like him, and lost his succession of the throne.
Thiệu Trị died in 1847, and appointed Hồng Bảo's younger brother Hồng Nhậm as successor.
In 1854, Hồng Bảo plotted a rebellion against Tự Đức and was forced to commit suicide.
Miên Bửu was suspected of taking in this plot, but there was no evidence.
Feeling sad for the fate of Hồng Bảo, he died in the same year.
Finally,
Tự Đức decided to pardon him, and granted him the title Tương An Quận Vương( 襄安郡王," Provincial Prince of Tương An") in 1878 posthumously.
Miên Bửu was good at writing Vietnamese poetry.
He and Nguyễn Phúc Miên Thẩm( Prince of Tùng Thiện), Nguyễn Phúc Miên Trinh( Prince of Tuy Lý), were known as" Tam Đường"( 三堂) of Nguyễn dynasty.
He was a member of" Mạc Vân thi x ã Mạc Vân Poetry Society").
Nguyễn Phúc Miên Định( Prince of Thọ Xuân), Nguyễn Phúc Miên
Thủ( Prince of Hàm Thuận), Nguyễn Phúc Miên Thẩm( Prince of Tùng Thiện), Nguyễn Phúc Miên Trinh( Prince of Tuy Lý), Nguyễn Phúc Miên Triện( Prince of Hoằng Hóa), Nguyễn Văn Siêu, Cao Bá Quát, Hà Tôn Quyền, Phan Thanh Giản and Nguyễn Đăng Giai were also members of this poetry society.
Nguyễn Phúc Miên Trinh
Nguyễn Phúc Miên Trinh( 3 February 1820 – 18 November 1897), born Nguyễn Phúc Thư( 阮福書), was a prince of Nguyễn dynasty, Vietnam.
Đào Duy Từ
Đào Duy Từ( 1572 – 1634) was a Vietnamese scholar, poet, military adviser, and mandarin who served under the reign of Nguyễn lord Nguyễn Phúc Nguyên.
Nguyễn Phúc Hồng Cai
Nguyễn Phúc Hồng Cai (阮福洪侅, 13 December 1845 – 15 May 1876) was a prince of Nguyễn dynasty, Vietnam.
He was the father of three emperors:
Kiến Phúc, Đồng Khánh and Hàm Nghi.
Hồng Cai was the twenty-sixth son of Thiệu Trị, and his mother was Trương Thị Vĩnh.
He was a filial son and liked studying.
He was granted the title Kiên Quốc Công (堅國公, "Duke of Kiên") in 1865.
Tự Đức had no child, and adopted his two sons, Ưng Đăng and Ưng Thị, whom later became Emperor Kiến Phúc and Emperor Đồng Khánh respectively.
Hồng Cai died in 1876 and received the posthumous name Thuần Nghị (純毅).
He was buried in Hương Thủy.
In 1885, Đồng Khánh ascended the throne, and granted him the title Kiên Vương (堅王, "Prince of Kiên") posthumously.
Later, his title was elevated to Kiên Thái Vương (堅太王, "King Father Kiên") in 1888.
Tự Đức
Tự Đức( lit." inheritance of virtues", 22 September 1829 – 17 July 1883)( personal name: Nguyễn Phúc Hồng Nhậm, also Nguyễn Phúc Thì) was the fourth emperor of the Nguyễn dynasty of Vietnam; he ruled from 1847 to 1883.
Thừa Thiên (empress)
Empress Thừa Thiên( 1762–1814), born Tống Phúc Thị Lan( 宋福氏蘭), was the first wife of Nguyễn Phúc Ánh( future Emperor Gia Long) and mother of Crown Prince Nguyễn Phúc Cảnh.
She was a daughter of general Tống Phước Khuông of Nguyễn lords.
Nguyễn
Ánh married her when he was at the age of 18.
Empress Thừa Thiên had two sons with Gia Long: Nguyen Phuc Chieu( who died after several days) and Crown Prince Nguyễn Phúc Cảnh.
After her death, she was buried at Gia Long's Thiên Thọ tomb, alongside the Emperor.
Nguyễn Phúc Luân
Nguyễn Phúc Luân or Nguyễn Phúc Côn( 阮福㫻, 1733 – 1765) was a son of lord Nguyễn Phúc Khoát and father of Nguyễn Phúc Ánh( future emperor Gia Long of Vietnam).
Thiệu Trị
Thiệu Trị (lit. "inheritance of prosperity"; 6 June 1807 – 4 November 1847), personal name Nguyễn Phúc Miên Tông or Nguyễn Phúc Tuyền, was the third emperor of the Nguyễn Dynasty.
He was the eldest son of Emperor Minh Mạng, and reigned from 14 February 1841 until his death on 4 November 1847.
Nguyễn Phúc Miên Định
Nguyễn Phúc Miên Định( 阮福綿定, 5 August 1810 – 5 November 1886), born Nguyễn Phúc Yến( 阮福宴), was a prince of Nguyễn dynasty, Vietnam.
Nguyễn Phúc Hồng Bảo
Nguyễn Phúc Hồng Bảo( 19 April 1825 – January 1854) was a prince of the Nguyễn dynasty, Vietnam.

Question: Who is the paternal grandfather of Nguyễn Phúc Hồng Cai?
Answer: Minh Mạng