Nguyễn Phúc Hồng Cai
Nguyễn Phúc Hồng Cai 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 in 1865. Tự Đức had no child, and adopted Hồng Cai's two sons, Ưng Đăng and Ưng Thị, who later became Emperor Kiến Phúc and Emperor Đồng Khánh respectively.
Hồng Cai died in 1876 and received the posthumous name Thuần Nghị. He was buried in Hương Thủy.
In 1885, Đồng Khánh ascended the throne, and granted him the title Kiên Vương posthumously. Later, his title was elevated to Kiên Thái Vương in 1888.
