William married Sophia Black on 11 Nov 1811 in Newton Stewart, Wigtownshire, Scotland. Sophia (daughter of William Black and Janet Douglas) was born about 1790 in Newton Stewart, Wigtownshire, Scotland; died on 9 Jan 1855 in Oxford Terrace, Edinburgh, Scotland. [Group Sheet] [Family Chart]

1. Jessie Douglas was born on 22 Feb 1813 in Stranraer, Wigtonshire, Scotland; died on 1 May 1892 in 1 Oxford Terrace, Edinburg.
2. John Alexander Douglas was born about 5 Sep 1814 in Stranraer, Wigtonshire, Scotland; died in Jun 1842 in Calcutta, India.
3. Margaret Douglas was born about 16 May 1816 in Stranraer, Wigtonshire, Scotland; died on 10 Mar 1887 in 7 Cambridge Street, Edinburgh.
4. Wilhelmina (or Williamina) Douglas was born about 30 Aug 1818 in Stranraer, Wigtonshire, Scotland; died on 28 Apr 1860 in 1 Oxford Terrace, Edinburgh, Scotland; was buried in West Church Burying Ground, Edinburgh.
5. Jane Douglas was born about 28 Mar 1821 in Stranraer, Wigtonshire, Scotland; died before 9 Jan 1855.
6. David Douglas was born about 1824 in Stranraer, Wigtonshire, Scotland; died on 4 Apr 1916 in 22 Drummond Place, Edinburgh.
7. James Douglas was born about 3 Jul 1826 in Stranraer, Wigtonshire, Scotland; died on 3 Aug 1904 in Tigh-na-Bruach, Dull, Aberfeldy, Perthshire, Scotland.
8. Mary Douglas was born about 1831 in Stranraer, Wigtonshire, Scotland; died on 28 Sep 1888 in 1 Oxford Terrace, Edinburgh, Scotland.