Robert Dundas of Arniston, the younger

The Much Honoured Lord Arniston FRSE
Portrait of Dundas by Henry Raeburn
Lord President of the Court of Session Lord Justice General
In office 30 April 1760 – 13 December 1787
Appointed by	George III
Preceded by	Robert Craigie
Succeeded by	Thomas Miller
Member of Parliament for Midlothian
In office 1754–1761
Preceded by	Robert Balfour-Ramsay
Succeeded by	Sir Alexander Gilmour
Lord Advocate
In office 1754–1760
Preceded by	William Grant
Succeeded by	Thomas Miller
Solicitor General for Scotland
In office 1742–1746
Preceded by	William Grant
Succeeded by	Patrick Haldane
Personal details
Born	18 July 1713 (1713-07-18)
Died	13 December 1787 (1787-12-14) (aged 74) Adam's Square, Edinburgh
Resting place	Borthwick
Political party	Whig
Spouses	Henrietta Baillie ​ ​ (m. 1741; died 1755)​ Jean Grant ​ (m. 1756)​
Children	8, including Robert, Francis, William, Philip
Parent(s)	Robert Dundas of Arniston Elizabeth Watson
Alma mater	University of Edinburgh Utrecht University
Profession	Advocate, Judge, Politician

Robert Dundas of Arniston, the younger, FRSE (18 July 1713 – 13 December 1787) was a Scottish judge. He served as Solicitor General for Scotland from 1742 to 1746, as Lord Advocate from 1754 to 1760, and as Member of Parliament for Midlothian from 1754 to 1761. He was Lord President of the Court of Session from 1760 to 1787, losing his popularity for giving his casting vote against Archibald Douglas in the famous Douglas Cause.