Alfred Roosevelt1
He lived at New York, U.S.A.G.1
Child of Alfred Roosevelt and Katherine Lowell
- Elfrida Roosevelt+3 d. 16 Jan 1963
Elfrida Roosevelt1 
From 19 June 1905, her married name became Clarke.
Children of Elfrida Roosevelt and Sir Orme Bigland Clarke, 4th Bt.
- Sir Humphrey Orme Clarke, 5th Bt.+2 b. 6 Jul 1906, d. 22 Jan 1973
- Alfred Roosevelt Orme Clarke2 b. 29 Aug 1909, d. 22 Jan 1911
- Charles Frederick Orme Clarke+2 b. 29 Aug 1909
Sir Humphrey Orme Clarke, 5th Bt.1 
He was educated at Eton College, Windsor, Berkshire, EnglandG.1 He was educated at Christ Church, Oxford University, Oxford, Oxfordshire, EnglandG.2 He was with the British Embassy to Washington between 1941 and 1944.2 He was with the Foreign Office between 1944 and 1946.2 He succeeded as the 5th Baronet Clarke, of Dunham Lodge, co. Norfolk [U.K., 1831] on 31 March 1949.2
Child of Sir Humphrey Orme Clarke, 5th Bt. and Elisabeth Cook
- Sir Charles Mansfield Tobias Clarke, 6th Bt.+2 b. 8 Sep 1939, d. 16 Sep 2019
Child of Sir Humphrey Orme Clarke, 5th Bt. and Constance Elizabeth Gibbs
- Orme Roosevelt Clarke+2 b. 30 Nov 1947, d. 21 Oct 1992
Alfred Roosevelt Orme Clarke1

Charles Frederick Orme Clarke1 
He was educated at Eton College, Windsor, Berkshire, EnglandG.1 He was educated at Christ Church, Oxford University, Oxford, Oxfordshire, EnglandG.1
Children of Charles Frederick Orme Clarke and Sylvia Vera Kaelin
- William Oliver Clarke+2 b. 17 Aug 1943, d. 7 Apr 2010
- Michael Nicholas Clarke2 b. 23 Mar 1945, d. 11 Oct 1968
- Katherine Sybil Clarke2 b. 26 Jul 1950
Sylvia Vera Kaelin1
From 11 April 1942, her married name became Clarke. She lived in 2003 at Weltpoststrasse 18/032, Berne, SwitzerlandG.1
Children of Sylvia Vera Kaelin and Charles Frederick Orme Clarke
- William Oliver Clarke+2 b. 17 Aug 1943, d. 7 Apr 2010
- Michael Nicholas Clarke2 b. 23 Mar 1945, d. 11 Oct 1968
- Katherine Sybil Clarke2 b. 26 Jul 1950
William Oliver Clarke1 
He was educated at Gordonstoun School, Elgin, Morayshire, ScotlandG.1 He graduated from Trinity College, Cambridge University, Cambridge, Cambridgeshire, EnglandG, with a Master of Arts (M.A.)1 He graduated from Camberwell School of Art, London, EnglandG.1 He was Assitant Conservation Officer of Oriental Antiquities Department, British Museum between 1974 and 1976.1 He became a Master in 1995, Mercers Company.1 He lived in 2003 at 13 Pembridge Gardens, London, EnglandG.1
Children of William Oliver Clarke and Elizabeth Ivimy
- Frederick William Michael Clarke+2 b. 9 Jul 1982
- Percival John Theodore Clarke+2 b. 29 Oct 1983
- Maximillian Tobias Ivimy Clarke2 b. 13 Oct 1986
John William Linnell Ivimy1
Child of John William Linnell Ivimy
Elizabeth Ivimy1
From 1981, her married name became Clarke.
Children of Elizabeth Ivimy and William Oliver Clarke
- Frederick William Michael Clarke+2 b. 9 Jul 1982
- Percival John Theodore Clarke+2 b. 29 Oct 1983
- Maximillian Tobias Ivimy Clarke2 b. 13 Oct 1986
Frederick William Michael Clarke1
Child of Frederick William Michael Clarke and Maria Alexandrovna Khanina
- Violet May Elfrida Clarke3 b. 12 May 2016
