Gwendolen Gisborne1 
From 28 June 1905, her married name became Twisleton-Wykeham-Fiennes.
Children of Gwendolen Gisborne and Gerard Yorke Twisleton-Wykeham-Fiennes
- Gerard Francis Gisborne Twisleton-Wykeham-Fiennes+2 b. 7 Jun 1906, d. 1985
- Richard Nathaniel Twisleton-Wykeham-Fiennes+2 b. 26 Nov 1909, d. 1988
- John Saye Wingfield Twisleton-Wykeham-Fiennes+2 b. 14 Apr 1911, d. 21 Apr 1996
- Michael Yorke Twisleton-Wykeham-Fiennes+2 b. 1 Jul 1912, d. 18 Feb 1989
- David Eustace Martindale Twisleton-Wykeham-Fiennes2 b. 7 Mar 1916, d. 7 Jul 1986
Gerard Francis Gisborne Twisleton-Wykeham-Fiennes1 
He was educated at Winchester College, Winchester, Hampshire, EnglandG.1 He graduated from Hertford College, Oxford University, Oxford, Oxfordshire, EnglandG, with a Master of Arts (M.A.)1 He graduated from Hertford College, Oxford University, Oxford, Oxfordshire, EnglandG, in 1929 with a Bachelor of Arts (B.A.)1 He was a director of Hargreaves Group.1 He was registered as a Member, Institute of Trasnport (M.Inst.T.)1 He was appointed Fellow, Royal Society of Arts (F.R.S.A.)1 He was appointed Officer, Most Venerable Order of the Hospital of St. John of Jerusalem (O.St.J.)1 He was a broadcaster.1 He wrote the book I Tried to Run a Railway.1 He was appointed Officer, Order of the British Empire (O.B.E.) in 1957.1
Children of Gerard Francis Gisborne Twisleton-Wykeham-Fiennes and Norah Davies
- Jeremy Twisleton-Wykeham-Fiennes+2 b. 9 Mar 1937
- Dr. Joslin Mary Twisleton-Wykeham-Fiennes+2 b. 11 May 1939
- Michael Wynn Twisleton-Wykeham-Fiennes+2 b. 8 Sep 1941
- Bronwen Margaret Twisleton-Wykeham-Fiennes+2 b. 7 Jul 1944
- Gerard Ivor Twisleton-Wykeham-Fiennes+2 b. 19 Feb 1946
Thomas Davies1
Child of Thomas Davies
- Norah Davies+2 d. 24 Dec 1960
Norah Davies1 
From 22 December 1934, her married name became Twisleton-Wykeham-Fiennes.
Children of Norah Davies and Gerard Francis Gisborne Twisleton-Wykeham-Fiennes
- Jeremy Twisleton-Wykeham-Fiennes+2 b. 9 Mar 1937
- Dr. Joslin Mary Twisleton-Wykeham-Fiennes+2 b. 11 May 1939
- Michael Wynn Twisleton-Wykeham-Fiennes+2 b. 8 Sep 1941
- Bronwen Margaret Twisleton-Wykeham-Fiennes+2 b. 7 Jul 1944
- Gerard Ivor Twisleton-Wykeham-Fiennes+2 b. 19 Feb 1946
Jeremy Twisleton-Wykeham-Fiennes1
He was educated at Winchester College, Winchester, Hampshire, EnglandG.1 He was educated at Clare College, Cambridge University, Cambridge, Cambridgeshire, EnglandG.1 He lived in 2003 at 36 Montpelier Grove, London, EnglandG.1
Child of Jeremy Twisleton-Wykeham-Fiennes and Else Brekke Larsen
Else Brekke Larsen1
From 1962, her married name became Twisleton-Wykeham-Fiennes.
Child of Else Brekke Larsen and Jeremy Twisleton-Wykeham-Fiennes
Nicole Juana Twisleton-Wykeham-Fiennes1
Michael Wynn Twisleton-Wykeham-Fiennes1
He was educated at Winchester College, Winchester, Hampshire, EnglandG.1 He graduated from Harvard Business School, Harvard University, Cambridge, Massachusetts, U.S.A.G, in 1968 with a Master of Business Administration (M.B.A.)1 He graduated from New College, Oxford University, Oxford, Oxfordshire, EnglandG, in 1968 with a Master of Arts (M.A.)1 He lived in 2003 at Burcott Manor, Wells, Somerset, EnglandG.1
Children of Michael Wynn Twisleton-Wykeham-Fiennes and Rosalie Ruth Sheppard
- Rupert Yorke Twisleton-Wykeham-Fiennes2 b. 20 Mar 1969
- Hugo Barnabas Twisleton-Wykeham-Fiennes2 b. 31 Mar 1971
- Joshua Gisborne Twisleton-Wykeham-Fiennes2 b. 9 May 1974
- Ivo Martindale Twisleton-Wykeham-Fiennes2 b. 21 Sep 1978