Thiệu Trị
Đồng Khánh was born on 19 December 1864 at Imperial City of Huế. He got the childhood name Chánh Mông when he was brought up in Chánh Mông palace. Đồng Khánh was the eldest son of Prince Nguyễn Phúc Hồng Cai (son of emperor Thiệu Trị) and Concubine Bùi Thị Thanh.