Douglas married Grace Margaret Tomlinson 4 Jun 1925, Somerville, , Massachusetts, United States. Grace (daughter of John William Tomlinson and Sarah Paulina Strang) was born 21 Apr 1903, Clinton, , Massachusetts, United States; died 8 Sep 1958, Mt Lebanon, Allegheny, Pennsylvania, United States; was buried , Oak Grove Cemetery, Medford, Middlesex, Massachusetts, United States,. [Group Sheet]

1. David Allan Steward was born 4 Apr 1927, Mineola, Nassau, New York, United States; died 27 Aug 1989, St Louis Park, Hennepin, Minnesota, United States.
2. Cynthia Weston Steward was born 21 May 1932, Johnstown, Cambria, Pennsylvania, United States; died 8 Apr 1976, Markham, , Ontario, Canada.