Peter Wedderburn, Lord Chesterhall 
He held the office of Lord of Session in 1755.2 He was styled as Lord Chesterhall [Scottish Law Lord] in 1755.2
Children of Peter Wedderburn, Lord Chesterhall and Janet Ogilvy
- Janet Wedderburn+2 d. Jun 1797
- Colonel David Wedderburn2 d. 1773
- Alexander Wedderburn, 1st Earl of Rosslyn+2 b. 13 Feb 1733, d. 3 Jan 1805
Janet Ogilvy 
Her married name became Wedderburn.
Children of Janet Ogilvy and Peter Wedderburn, Lord Chesterhall
- Janet Wedderburn+1 d. Jun 1797
- Colonel David Wedderburn1 d. 1773
- Alexander Wedderburn, 1st Earl of Rosslyn+1 b. 13 Feb 1733, d. 3 Jan 1805
- [S37] BP2003 volume 3, page 3406. See link for full details for this source. Hereinafter cited as. [S37]
Captain David Ogilvy1 
Child of Captain David Ogilvy
- Janet Ogilvy+1 d. Jun 1771
- [S37] BP2003 volume 3, page 3406. See link for full details for this source. Hereinafter cited as. [S37]
Alexander Wedderburn, 1st Earl of Rosslyn 

by Joshua Reynolds, 1785 1
Alexander Wedderburn, 1st Earl of Rosslyn was born on 13 February 1733 at East Lothian, Scotland.2 He was the son of Peter Wedderburn, Lord Chesterhall and Janet Ogilvy.3 He married, firstly, Betty Anne Dawson, daughter of John Dawson, on 31 December 1767.3 He married, secondly, Hon. Charlotte Courtenay, daughter of William Courtenay, 1st Viscount Courtenay of Powderham Castle and Lady Frances Finch, on 12 September 1782.3 He died on 3 January 1805 at age 71 at Baylis, Salt Hill, Windsor, Berkshire, England.2
He was educated at Edinburgh University, Edinburgh, Midlothian, Scotland.3 He was admitted to the Faculty of Advocates in 1754.3 He was admitted to Inner Temple in 1757 entitled to practise as a barrister.3 He held the office of Member of Parliament (M.P.) (Tory) for Ayr Burghs between 1761 and 1768.3 He was appointed King’s Counsel (K.C.) in 1763.3 He held the office of Bencher of Lincoln’s Inn in 1763.3 He held the office of Member of Parliament (M.P.) (Tory) for Richmond, Yorkshire between 1768 and 1769.3 He held the office of Member of Parliament (M.P.) (Tory) for Bishop’s Castle between 1770 and 1774.3 He held the office of Solicitor-General in 1771.3 He held the office of Member of Parliament (M.P.) (Tory) for Okehampton between 1774 and 1778.3 He held the office of Member of Parliament (M.P.) (Tory) for Bishop’s Castle between 1778 and 1780.3 He held the office of Attorney-General between 1778 and 1780.3 He was appointed Privy Counsellor (P.C.) in 1780.3 He held the office of Lord Chief Justice between 1780 and 1793.3 He was created 1st Baron Loughborough, of Loughborough, co. Leicester [Great Britain] on 17 June 1780.3 He held the office of First Commissioner of the Great Seal between April 1783 and December 1783.3 He was appointed Fellow, Royal Society (F.R.S.) in 1787.3 He was appointed Fellow, Society of Antiquaries (F.S.A.) in 1787.3 He held the office of Lord Chancellor between 1793 and 1801.2 He held the office of Elder Brother of Trinity House between 1799 and 1805.3 He held the office of Trustee of the British Museum between 1801 and 1805.3 He succeeded as the 1st Baron Loughborough, of Loughborough, Surrey [Great Britain] on 21 April 1801, with special remainder to his sister’s sons.3 He was created 1st Earl of Rosslyn [U.K.] on 21 April 1801, with special remainder to his sister’s sons.3
Child of Alexander Wedderburn, 1st Earl of Rosslyn and Hon. Charlotte Courtenay
- Hon. unknown Wedderburn3 b. 2 Oct 1793, d. c 1794
- [S3409] Caroline Maubois, “re: Penancoet Family,” e-mail message to BENR, 2 December 2008. Hereinafter cited as “re: Penancoet Family.”
- [S130] Wikipedia, online http;//www.wikipedia.org. Hereinafter cited as Wikipedia.
- [S37] BP2003 volume 3, page 3406. See link for full details for this source. Hereinafter cited as. [S37]
Betty Anne Dawson1 
Her married name became Wedderburn. After her marriage, Betty Anne Dawson was styled as Baroness Loughborough on 17 June 1780.
- [S37] BP2003 volume 3, page 3406. See link for full details for this source. Hereinafter cited as. [S37]
John Dawson1 
Child of John Dawson
- Betty Anne Dawson1 d. 15 Feb 1781
- [S37] BP2003 volume 3, page 3406. See link for full details for this source. Hereinafter cited as. [S37]
Hon. Charlotte Courtenay1 
After her marriage, Hon. Charlotte Courtenay was styled as Baroness Loughborough on 12 September 1782. From 12 September 1782, her married name became Wedderburn. After her marriage, Hon. Charlotte Courtenay was styled as Countess of Rosslyn on 21 April 1801.
Child of Hon. Charlotte Courtenay and Alexander Wedderburn, 1st Earl of Rosslyn
- Hon. unknown Wedderburn1 b. 2 Oct 1793, d. c 1794
- [S37] BP2003 volume 3, page 3406. See link for full details for this source. Hereinafter cited as. [S37]
James St. Clair-Erskine, 2nd Earl of Rosslyn1 
He was given the name of James Erskine at birth.1 He succeeded as the 5th Baronet Erskine, of Alva [N.S., 1666] on 7 August 1765.1 He was educated at Edinburgh Academy, Edinburgh, Midlothian, Scotland.1 He was educated at Eton College, Windsor, Berkshire, England.1 He gained the rank of Cornet in the 1st Horse Guards.1 He gained the rank of Lieutenant in the 35th Foot.1 He gained the rank of Lieutenant in 1778 in the 2nd Dragoons.1 He gained the rank of Captain in 1780 in the 19th Light Dragoons.1 He held the office of Member of Parliament (M.P.) (Whig) for Castle Rising between 1781 and 1784.1 He was Aide-de-Camp to the Lord-Lieutenant of Ireland in 1782.1 He gained the rank of Major in 1783 in the 8th Light Dragoons.1 He held the office of Member of Parliament (M.P.) (Whig) for Morpeth between 1784 and 1796.1 He held the office of Director of Chancery [Scotalnd] in 1785.1 On 9 June 1789 his name was legally changed to James St. Clair-Erskine by Royal Licence.1 He was Aide-de-Camp to the King George III in 1792.1 He gained the rank of Lieutenant-Colonel in 1792 in the 12th Light Dragoons.1 He was Adjutant-General to the Corsican Campaign in 1793.1 He gained the rank of Colonel in 1795.1 He gained the rank of Brigadier-General in 1796 in the Portugal.1 He held the office of Member of Parliament (M.P.) (Whig) for Kirkcaldy Burghs between 1796 and 1805.1 He gained the rank of Major-General in 1798.1 He was Commander-in-Chief of the Mediterranean between 1798 and 1799.1 He gained the rank of Colonel in the Sussex Fencible Cavalry.1 He gained the rank of Colonel in 1801 in the 9th Light Dragoons.1 He gained the rank of Lieutenant-General in 1805.1 He succeeded as the 2nd Baron Loughborough, of Loughborough, Surrey [G.B., 1795] on 3 January 1805.1 He succeeded as the 2nd Earl of Rosslyn [U.K., 1801] on 3 January 1805.1 He fought in the Denmark Campaign in 1807.1 He fought in the Walcheren Expedition in 1809.1 He gained the rank of General in 1814.1 He was appointed Knight Grand Cross, Order of the Bath (G.C.B.) in 1820.1 He held the office of Lord-Lieutenant of Fifeshire between 1828 and 1837.1 He was appointed Privy Counsellor (P.C.) in 1829.1 He held the office of Lord Privy Seal from 1829 to 1830.1 He held the office of Lord President of the Council from 1834 to 1835.1 He held the office of a Lord of Treasury from November 1834 to December 1834.1
Children of James St. Clair-Erskine, 2nd Earl of Rosslyn and Harriet Elizabeth Bouverie
- Lady Janet St. Clair-Erskine+1 d. 16 Nov 1880
- Henry Alexander St. Clair-Erskine1 b. 2 Jun 1792
- James Alexander St. Clair-Erskine, 3rd Earl of Rosslyn+1 b. 15 Feb 1802, d. 16 Jun 1866
- Hon. Henry Francis St. Clair-Erskine1 b. 1804, d. 24 May 1829
Harriet Elizabeth Bouverie1 
Her married name became Erskine. After her marriage, Harriet Elizabeth Bouverie was styled as Countess of Rosslyn on 3 January 1805.
Children of Harriet Elizabeth Bouverie and James St. Clair-Erskine, 2nd Earl of Rosslyn
- Lady Janet St. Clair-Erskine+2 d. 16 Nov 1880
- Henry Alexander St. Clair-Erskine2 b. 2 Jun 1792
- James Alexander St. Clair-Erskine, 3rd Earl of Rosslyn+2 b. 15 Feb 1802, d. 16 Jun 1866
- Hon. Henry Francis St. Clair-Erskine2 b. 1804, d. 24 May 1829
Katherine Mary Walrond1 
Her married name became Troyte.
Children of Katherine Mary Walrond and Colonel Charles Arthur William Troyte
- Cicely Mary Troyte1 d. 29 Dec 1960
- Arthur Acland Troyte1 b. 30 Mar 1865, d. 30 Mar 1883
- Lt.-Col. Hugh Leonard Acland-Troyte1 b. 18 Dec 1870, d. 17 Apr 1918
- Lt.-Col. Sir Gilbert John Acland-Troyte1 b. 4 Sep 1876, d. 27 Apr 1964
- Frances Lucy Troyte1 b. c 1877, d. 11 Nov 1921
- Herbert Walter Acland-Troyte+1 b. 13 Sep 1882, d. 24 Nov 1943
- [S8] BP1999 volume 1, page 23. See link for full details for this source. Hereinafter cited as. [S8]