Donald married Ellen (Nellie) Montgomery Ramsay 3 Sep 1884, Bayview, , Prince Edward Island, Canada. Ellen (daughter of Malcolm Ramsay and Mary Jardine Owen) was born 28 Aug 1858; died 16 Jun 1928, Bayview, , Prince Edward Island, Canada. [Group Sheet]

1. Clemmie Barbara Simpson was born 25 Sep 1885, Bayview, , Prince Edward Island, Canada; died May 1970, Charlottetown, Queens, Prince Edward Island, Canada.
2. Preston Ramsay Simpson was born Jun 1887; died 13 Nov 1887.
3. Earle Owen Simpson was born 20 Aug 1891, Bayview, , Prince Edward Island, Canada; died 28 Feb 1975, Charlottetown, , Prince Edward Island, Canada; was buried 2 Mar 1975, ? Cemetery, Cavendish, Queens, Prince Edward Island, Canada.
4. Harold Henry Hill Simpson was born 17 Mar 1897, Bay View, , Prince Edward Island, Canada; died 16 Dec 1975, Amherst, Cumberland, Nova Scotia, Canada.