Phẩm was born in 1905. Phẩm's father was Lạn and her mother was Định Nguyễn. Her paternal grandparents were Gị and Khương Phạm. She had five brothers and two sisters, named Thiện, Thọ, Việt, Huỳnh, Hàm, Cát and Chức. She had two half-brothers and four half-sisters, named Chúc, Tử, Cúc, Mai, Đồng and Biền.