Frances Cay1 
Child of Frances Cay and John Clerk-Maxwell of Middlebie
- James Clerk-Maxwell of Middlebie2 b. 13 Jun 1831, d. 5 Nov 1879
James Clerk-Maxwell of Middlebie1 
He was appointed Fellow, Royal Society (F.R.S.)1 He was Professor of Experimental Physics at Cambridge University, Cambridge, Cambridgeshire, EnglandG.1 He lived at Middlebie, Dumfries-shire, ScotlandG.1
Very Rev. Daniel Dewar1
Child of Very Rev. Daniel Dewar
Katherine Mary Dewar1
Isabella Clerk1 
From 28 October 1813, her married name became Wedderburn.1
Children of Isabella Clerk and Rt. Hon. James Wedderburn
- James Wedderburn4 b. 23 Sep 1814, d. 17 Jul 1863
- Janet Isabella Wedderburn3 b. 2 Oct 1815, d. 1852
- George Wedderburn3 b. 25 Mar 1817, d. 1865
- Jean Wedderburn3 b. 7 Aug 1818, d. 1879
- Maj.-Gen. John Wedderburn4 b. 5 Jul 1820, d. 4 Jan 1879
- Andrew Wedderburn-Maxwell of Middlebie+3 b. 16 Dec 1821, d. 12 May 1896
- Jemima Wedderburn2 b. 1 May 1823, d. 1909
- [S37] BP2003 volume 1, page 816. See link for full details for this source. Hereinafter cited as. [S37]
- [S130] Wikipedia, online http;//www.wikipedia.org. Hereinafter cited as Wikipedia.
- [S37] BP2003. [S37]
- [S1042] Peter Wood, “re: Persse Family,” e-mail message to British and European Nobility Register, 2003 to 2021. Hereinafter cited as “re: Persse Family.”
Rt. Hon. James Wedderburn1 
He was given the name of James Wedderburn-Colvile at birth.2 His name was legally changed to James Wedderburn.2 He held the office of Solicitor-General [Scotland] in 1816.3
Children of Rt. Hon. James Wedderburn and Isabella Clerk
- James Wedderburn4 b. 23 Sep 1814, d. 17 Jul 1863
- Janet Isabella Wedderburn2 b. 2 Oct 1815, d. 1852
- George Wedderburn2 b. 25 Mar 1817, d. 1865
- Jean Wedderburn2 b. 7 Aug 1818, d. 1879
- Maj.-Gen. John Wedderburn4 b. 5 Jul 1820, d. 4 Jan 1879
- Andrew Wedderburn-Maxwell of Middlebie+2 b. 16 Dec 1821, d. 12 May 1896
- Jemima Wedderburn3 b. 1 May 1823, d. 1909
- [S37] BP2003 volume 1, page 816. See link for full details for this source. Hereinafter cited as. [S37]
- [S37] BP2003. [S37]
- [S130] Wikipedia, online http;//www.wikipedia.org. Hereinafter cited as Wikipedia.
- [S1042] Peter Wood, “re: Persse Family,” e-mail message to British and European Nobility Register, 2003 to 2021. Hereinafter cited as “re: Persse Family.”
Gustavus Smith1
Child of Gustavus Smith
- Eleanor Smith+1 d. 29 May 1937
- [S37] BP2003 volume 1, page 818. See link for full details for this source. Hereinafter cited as. [S37]
Beryl Walsh1
From 1960, her married name became Clerk.1
- [S37] BP2003 volume 1, page 818. See link for full details for this source. Hereinafter cited as. [S37]