Kathleen Jane Duff1 
- [S1438] Sir William, Bt. Arbuthnot, “re: Arbuthnot and Duff Families,” e-mail message to British and European Nobility Register, 29 August 2005 and later. Hereinafter cited as “re: Arbuthnot and Duff Families.”
Helen Mary Duff1 
- [S1438] Sir William, Bt. Arbuthnot, “re: Arbuthnot and Duff Families,” e-mail message to British and European Nobility Register, 29 August 2005 and later. Hereinafter cited as “re: Arbuthnot and Duff Families.”
Jessie Margaret Duff1 
She was the Matron at Dundee Infirmary, Dundee, Angus, ScotlandG.2
- [S1438] Sir William, Bt. Arbuthnot, “re: Arbuthnot and Duff Families,” e-mail message to British and European Nobility Register, 29 August 2005 and later. Hereinafter cited as “re: Arbuthnot and Duff Families.”
- [S37] BP2003 volume 1, page 1205. See link for full details for this source. Hereinafter cited as. [S37]
Ludovic James Colquhoun Duff1 
- [S1438] Sir William, Bt. Arbuthnot, “re: Arbuthnot and Duff Families,” e-mail message to British and European Nobility Register, 29 August 2005 and later. Hereinafter cited as “re: Arbuthnot and Duff Families.”
- [S37] BP2003 volume 1, page 1204. See link for full details for this source. Hereinafter cited as. [S37]
Isabella Ann Orr-Paterson1
Isabella Ann Orr-Paterson also went by the nick-name of Sybil.3 From 2 October 1915, her married name became Blatherwick.3 From 28 October 1948, her married name became Duff.1
- [S1438] Sir William, Bt. Arbuthnot, “re: Arbuthnot and Duff Families,” e-mail message to British and European Nobility Register, 29 August 2005 and later. Hereinafter cited as “re: Arbuthnot and Duff Families.”
- [S1605] J.N. Houterman, “re: Crosby Family,” e-mail message to BENR, 6 February 2006. Hereinafter cited as “re: Crosby Family.”
- [S37] BP2003 volume 1, page 1204. See link for full details for this source. Hereinafter cited as. [S37]
Jean Alison Mary Duff1 
- [S1438] Sir William, Bt. Arbuthnot, “re: Arbuthnot and Duff Families,” e-mail message to British and European Nobility Register, 29 August 2005 and later. Hereinafter cited as “re: Arbuthnot and Duff Families.”
James Duff Dunlop Duff1

He was educated at Fettes College, Edinburgh, Midlothian, ScotlandG.2 He was a Fellow, specialising in Latin and Russian between 1883 and 1940 at Trinity College, Cambridge University, Cambridge, Cambridgeshire, EnglandG.1 He graduated from Trinity College, Cambridge University, Cambridge, Cambridgeshire, EnglandG, in 1885 with a Master of Arts (M.A.)3
Children of James Duff Dunlop Duff and Laura Eleanor Lenox-Conyngham
- Maj.-Gen. Alan Colquhoun Duff+1 b. 11 Nov 1896, d. 4 Nov 1973
- Sir James Fitzjames Duff4 b. 1 Feb 1898, d. 1970
- Patrick William Duff4 b. 21 Feb 1901
- Mary Geraldine Duff4 b. 9 Mar 1904, d. 26 Nov 1995
- Hester Laura Elisabeth Duff4 b. 17 Aug 1912, d. c Aug 2001
- [S1438] Sir William, Bt. Arbuthnot, “re: Arbuthnot and Duff Families,” e-mail message to British and European Nobility Register, 29 August 2005 and later. Hereinafter cited as “re: Arbuthnot and Duff Families.”
- [S47] BIFR1976 page 270. See link for full details for this source. Hereinafter cited as. [S47]
- [S37] BP2003 volume 1, page 1204. See link for full details for this source. Hereinafter cited as. [S37]
- [S37] BP2003. [S37]
Laura Eleanor Lenox-Conyngham1 
From 28 December 1895, her married name became Duff.1
Children of Laura Eleanor Lenox-Conyngham and James Duff Dunlop Duff
- Maj.-Gen. Alan Colquhoun Duff+1 b. 11 Nov 1896, d. 4 Nov 1973
- Sir James Fitzjames Duff3 b. 1 Feb 1898, d. 1970
- Patrick William Duff3 b. 21 Feb 1901
- Mary Geraldine Duff3 b. 9 Mar 1904, d. 26 Nov 1995
- Hester Laura Elisabeth Duff3 b. 17 Aug 1912, d. c Aug 2001
- [S1438] Sir William, Bt. Arbuthnot, “re: Arbuthnot and Duff Families,” e-mail message to British and European Nobility Register, 29 August 2005 and later. Hereinafter cited as “re: Arbuthnot and Duff Families.”
- [S47] BIFR1976 page 269. See link for full details for this source. Hereinafter cited as. [S47]
- [S37] BP2003 See link for full details for this source. Hereinafter cited as. [S37]
Maj.-Gen. Alan Colquhoun Duff1 
He was educated at Wellington College, Berkshire, EnglandG.1 He was educated at Royal Military Academy, Woolwich, Kent, EnglandG.2 He fought in the First World War.2 He was awarded the Military Cross (M.C.) in 1916.1 He gained the rank of Major in 1930.2 He gained the rank of Lieutenant-Colonel in 1938.2 He fought in the Second World War, where he was mentioned in despatches twice.2 He was appointed Officer, Order of the British Empire (O.B.E.) in 1941.1 He gained the rank of Colonel in 1941.2 He was appointed Companion, Order of the Bath (C.B.) in 1945.1 He was awarded the Commander, U.S. Legion of Merit.1 He gained the rank of Major-General in 1946 in the Royal Engineers.1
Children of Maj.-Gen. Alan Colquhoun Duff and Diana Frances Crawley
- Lindsay Margaret Duff+4 b. 14 Jun 1937
- James Richard Valentine Duff+4 b. 19 Oct 1941
- Christian Frances Duff4 b. 11 Nov 1942, d. 9 Jun 2018
- [S1438] Sir William, Bt. Arbuthnot, “re: Arbuthnot and Duff Families,” e-mail message to British and European Nobility Register, 29 August 2005 and later. Hereinafter cited as “re: Arbuthnot and Duff Families.”
- [S37] BP2003 volume 1, page 1205. See link for full details for this source. Hereinafter cited as. [S37]
- [S266] World War II Unit Histories – Officers, online http://www.unithistories.com/units_index/default.asp?file=../officers/personsx. Hereinafter cited as World War II Unit Histories – Officers.
- [S37] BP2003. [S37]
Diana Frances Crawley1 
From 14 February 1935, her married name became Duff.1
Children of Diana Frances Crawley and Maj.-Gen. Alan Colquhoun Duff
- Lindsay Margaret Duff+2 b. 14 Jun 1937
- James Richard Valentine Duff+2 b. 19 Oct 1941
- Christian Frances Duff2 b. 11 Nov 1942, d. 9 Jun 2018
