Sỹ-Cao's father was Hỗ and his mother was Úc Nguyễn văn. His paternal grandparents were Gị and Khương Phạm. He had four brothers and four sisters, named Đức, Dũng-Trí, Chí-Mỹ, Đạo-Đại, Thuần, Bích, Hiếu and Hòa. He was the second youngest of the nine children. He died in 1964.