Robert F. 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.”
Albert Adam 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.”
George G. Duff1 
Child of George G. Duff and Mary Kayll
- George G. Duff1 b. 1869
- [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 Kayll1
Her married name became Duff.1
Child of Mary Kayll and George G. Duff
- George G. Duff1 b. 1869
- [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.”
George G. 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.”
L. Beechcroft1
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.”
Adam 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.”
Captain Arthur Meredith Duff1 
He gained the rank of Captain in the 74th Highlanders.1
Child of Captain Arthur Meredith Duff and Frances Eliza Tanner
- William Stewart Bruton Duff+1 b. 6 Nov 1877
- [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.”
Frances Eliza Tanner1 
From 28 November 1876, her married name became Duff.1
Child of Frances Eliza Tanner and Captain Arthur Meredith Duff
- William Stewart Bruton Duff+1 b. 6 Nov 1877
- [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.”
William Stewart Bruton Duff1 
Child of William Stewart Bruton Duff and Wilhelmina Zeta (?)
- Lt.-Cdr. Malcolm John Luxmoore Duff1 b. 22 Jul 1919, d. 1982
- [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.”
- [S7535] Judy Wright, “re: Harris Family,” e-mail message to Judy Wright, 17 April 2015. Hereinafter cited as “re: Harris Family.”
