Lt.-Col. James Duff of Knockleith1 
He gained the rank of Captain in the 74th Regiment.3 He gained the rank of Colonel in the Banff, Moray and Nairn Militia.3 He lived at Knockleith, Aberdeenshire, ScotlandG.3
Children of Lt.-Col. James Duff of Knockleith and Jane Bracken Dunlop
- Jane Louisa Duff+2 b. 24 Jan 1856, d. 1949
- Mary Clementina Duff2 b. c 1857, d. c 1867
- Reverend Garden Llanoe Duff+2 b. 9 May 1858, d. 13 Nov 1938
- Jessie Margaret Duff2 b. 25 Sep 1859, d. 4 Aug 1910
- Alan Colquhoun Duff+2 b. 20 Nov 1860, d. 5 Jan 1897
- James Duff Dunlop Duff+2 b. 20 Nov 1860, d. 25 Apr 1940
- Sir Alexander Ludovic Duff+2 b. 20 Feb 1862, d. 22 Nov 1933
- Reverend Charles Edmund Duff+3 b. 17 Mar 1863
- John Duff+3 b. 12 Apr 1864, d. c 1935
- Helen Duff3 b. 14 Oct 1865, d. 1954
- Katherine Duff+3 b. 6 Nov 1866, d. 22 Dec 1927
- Rose Mary Duff+3 b. 22 Sep 1868, d. 25 Apr 1963
- Alice Duff3 b. 13 Oct 1870
- Mabel Duff3 b. 6 Dec 1871, d. 9 Apr 1908
- [S37] BP2003 volume 1, page 1205. See link for full details for this source. Hereinafter cited as. [S37]
- [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. [S37]
Jane Bracken Dunlop1
From April 1855, her married name became Duff.1
Children of Jane Bracken Dunlop and Lt.-Col. James Duff of Knockleith
- Jane Louisa Duff+1 b. 24 Jan 1856, d. 1949
- Mary Clementina Duff1 b. c 1857, d. c 1867
- Reverend Garden Llanoe Duff+1 b. 9 May 1858, d. 13 Nov 1938
- Jessie Margaret Duff1 b. 25 Sep 1859, d. 4 Aug 1910
- Alan Colquhoun Duff+1 b. 20 Nov 1860, d. 5 Jan 1897
- James Duff Dunlop Duff+1 b. 20 Nov 1860, d. 25 Apr 1940
- Sir Alexander Ludovic Duff+1 b. 20 Feb 1862, d. 22 Nov 1933
- Reverend Charles Edmund Duff+2 b. 17 Mar 1863
- John Duff+2 b. 12 Apr 1864, d. c 1935
- Helen Duff2 b. 14 Oct 1865, d. 1954
- Katherine Duff+2 b. 6 Nov 1866, d. 22 Dec 1927
- Rose Mary Duff+2 b. 22 Sep 1868, d. 25 Apr 1963
- Alice Duff2 b. 13 Oct 1870
- Mabel Duff2 b. 6 Dec 1871, d. 9 Apr 1908
Alan Colquhoun Dunlop1
Child of Alan Colquhoun Dunlop
- [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.”
Mary Clementina 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.”
Reverend Garden Llanoe Duff1 
He graduated from Trinity College, Cambridge University, Cambridge, Cambridgeshire, EnglandG, in 1884 with a Master of Arts (M.A.)2 He was the Rector between 1888 and 1923 at St. Congan, Turriff, Aberdeenshire, ScotlandG.2 He held the office of Canon of Aberdeen between 1922 and 1923.2
Children of Reverend Garden Llanoe Duff and Elizabeth Dunlop
- Garden Andrew Duff3 b. 27 Feb 1886, d. 16 Jul 1906
- Enid Blackburn Duff+3 b. 3 Oct 1889, d. 1971
- Kathleen Jane Duff1 b. 19 Oct 1891
- Helen Mary Duff1 b. 2 Apr 1894
- [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]
- [S37] BP2003. [S37]
Elizabeth Dunlop1 
From 7 October 1885, her married name became Duff.1
Children of Elizabeth Dunlop and Reverend Garden Llanoe Duff
- Garden Andrew Duff2 b. 27 Feb 1886, d. 16 Jul 1906
- Enid Blackburn Duff+1 b. 3 Oct 1889, d. 1971
- Kathleen Jane Duff1 b. 19 Oct 1891
- Helen Mary Duff1 b. 2 Apr 1894
- [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 See link for full details for this source. Hereinafter cited as. [S37]
- [S37] BP2003. [S37]
Andrew Anderson Dunlop of Keppoch, younger1
Child of Andrew Anderson Dunlop of Keppoch, younger
- Elizabeth Dunlop+2 d. 14 Jul 1944
Garden Andrew Duff1 
He was in the army.3
- [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 See link for full details for this source. Hereinafter cited as. [S37]
- [S37] BP2003. [S37]
Enid Blackburn Duff1 
From 22 January 1922, her married name became Forbes.1
Children of Enid Blackburn Duff and Reverend Edward Archibald Forbes
- Elizabeth Helen Forbes+3 b. 5 Jul 1923, d. 1997
- Andrew Garden Duff Forbes+3 b. 21 Jun 1925, d. 5 Apr 2018
- Edward Spencer Dundas Forbes3 b. 14 Jun 1928, d. 9 Dec 1951
- [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]
- [S37] BP2003. [S37]
Reverend Edward Archibald Forbes1 
He graduated from Trinity College, Cambridge University, Cambridge, Cambridgeshire, EnglandG, with a Master of Arts (M.A.)1 He was the Rector at St. Congan’s, Turriff, Aberdeenshire, ScotlandG.1 He gained the rank of Chaplain to the Forces between 1915 and 1916.1 He held the office of Canon of St. Mary’s Cathedral, Glasgow.1
Children of Reverend Edward Archibald Forbes and Enid Blackburn Duff
- Elizabeth Helen Forbes+2 b. 5 Jul 1923, d. 1997
- Andrew Garden Duff Forbes+2 b. 21 Jun 1925, d. 5 Apr 2018
- Edward Spencer Dundas Forbes2 b. 14 Jun 1928, d. 9 Dec 1951
