Đàm was born on October 8th, 1953 in Hà-nội. Đàm's father is Khoa and his mother was Thanh-Thảo Phan. His paternal grandparents were Ngạc and Nhất Trần thị. He has four brothers and a sister, named Khiêm, Nhượng, Tuân, Luận and Thúy-Hồng. He is the second youngest of the six children.