Hoan was born on December 13th, 1926. Hoan's father was Hồ and his mother was Can Nguyễn Hữu. His paternal grandparents were Mạnh Cung and Hoan (Loan) Đỗ. He has two brothers and three sisters, named Ban, Ký, Bột, Bật and Tham. He is the second youngest of the six children.