Daniel S. Rees is the son of William Maurice Rees and Constance Annie MacDuff Adams.

Daniel was born in 1915 in Wednesbury, Staffordshire.

Daniel married Hilda Hartill in 1945 in Wednesbury, Staffordshire.

He had the following children from his marriage to Hilda Hartill:

- Daniel M. Rees	born in 1945 in Wednesbury, Staffordshire.
- Carol Anne Rees	born in 1949 in Wednesbury, Staffordshire.
- Allan J. Rees	born in 1955 in Wednesbury, Staffordshire.

Details of Daniel's occupation are not known.