Frances Dalzell1 
From 7 April 1757, her married name became Duff.
Children of Frances Dalzell and Hon. George Duff
- James Duff2 b. 1758, d. 29 Mar 1832
- George Duff3 b. 1760, d. 1828
- Jane Duff2 b. 1765, d. 1792
- Frances Duff2 b. 26 Jun 1766, d. 6 Mar 1787
- [S37] BP2003 volume 1, page 1426. 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]
James Duff1 
He was a lunatic from birth.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.”
George Duff1 
- [S37] BP2003 volume 2, page 1545. 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.”
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.”
Frances 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.”
Hon. Ludovic Duff1 
He was also known as Lewis.2 He gained the rank of Captain in the 8th Regiment.1
- [S37] BP2003 volume 2, page 1545. 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.”
Deborah Davis1 
From 1767, her married name became Duff.2
- [S37] BP2003 volume 2, page 1545. 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.”
Patrick 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.”
Lady Helen Duff1 
Child of Lady Helen Duff and Vice-Admiral Robert Duff of Logie and Fetteresso
- Robert William Duff, 2nd of Fetteresso+2 b. 1767, d. 22 Mar 1834
- [S37] BP2003 volume 1, page 1426. 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.”
Vice-Admiral Robert Duff of Logie and Fetteresso1 
by Sir Joshua Reynolds 2
Vice-Admiral Robert Duff of Logie and Fetteresso was born in 1721.3 He was the son of Patrick Duff of Craigston and Mary Urquhart.3 He married Lady Helen Duff, daughter of William Duff, 1st Earl Fife and Jean Grant, in 1764.1 He died on 6 June 1787.1
He gained the rank of Vice-Admiral of the Red.1
Child of Vice-Admiral Robert Duff of Logie and Fetteresso and Lady Helen Duff
- Robert William Duff, 2nd of Fetteresso+3 b. 1767, d. 22 Mar 1834
- [S37] BP2003 volume 1, page 1426. See link for full details for this source. Hereinafter cited as. [S37]
- [S3409] Caroline Maubois, “re: Penancoet Family,” e-mail message to BENR, 2 December 2008. Hereinafter cited as “re: Penancoet Family.”
- [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.”
