Đăng's father was Nhận and his mother was An Nguyễn. His paternal grandparents were Tích and Vân Nguyễn. He had a sister named Sung. He had a half-brother and two half-sisters, named Lễ, Luyến and Theo. He died due to giỗ 28/3 âm lịch. He was buried in Gạc Bổi.