啟定帝
Lê Xuân Nhuận's father was a native of Hà Nội (Northern Vietnam) who came to Huế, the then imperial capital (Central Vietnam) to be a mandarin under Emperor Bảo Đại who had been at school in France. His mother, a native of Huế, was daughter of a royal physician under Emperor Khải Định (Bảo Đại's father).