Thuần was born in 1924. Thuần's father was Hỗ and her mother was Úc Nguyễn văn. Her paternal grandparents were Gị and Khương Phạm. She had five brothers and three sisters, named Đức, Dũng-Trí, Chí-Mỹ, Sỹ-Cao, Đạo-Đại, Bích, Hiếu and Hòa. She is the oldest of the nine children.