Uy was born on February 8th, 1927. Uy's father was Thúc and her mother was Hậu Nguyễn quí. Her paternal grandparents were Tiêu and Cưu Đinh. She has three brothers and two sisters, named Tề, Bảo, Túy, Chúc and Bình-Minh. She is the third oldest of the six children.