William married Louisa Stewart on 18 Dec 1823 in London, Middlesex, England. Louisa (daughter of George (8th Earl of Galloway) Stewart and Jane Paget) was born on 18 Mar 1804 in Westminster, Middlesex, England; died on 5 Mar 1889 in Royal Tunbridge Wells, Tunbridge Wells Borough, Kent, England. [Group Sheet] [Family Chart]

1. Gertrude Duncombe was born on 4 Apr 1827 in St Marylebone, London, England; died on 24 Feb 1916 in Hampshire, England.
2. William Ernest Duncombe (maid. name 1st Earl Feversham of Rydale) was born on 28 Jan 1829 in Hutton Pagnell, Yorkshire, England; died on 13 Jan 1915 in Duncombe Park Manor, Helmsley, Yorkshire, England.
3. Helen Duncombe was born in 1831 in St Marylebone, London, England; died on 22 Nov 1896 in Torquay, Devon, England.
4. Cecil Duncombe was born on 27 May 1832 in St Marylebone, London, England; died on 20 May 1902 in Toddington, Winchcombe, Gloucestershire, England.