Tố-Lan was born on June 21st, 1944 in Hà-nội. Tố-Lan's father was Đĩnh and her mother was Lai Phạm. Her paternal grandparents were Tiên and Tuất Nghiêm phú. She had four brothers and two sisters, named Đắc, Thiên, Bắc, Tài, Lai-Hà and Lê-Cư. She is the second oldest of the seven children.