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Duncan McNeill, 1st Baron Colonsay

1793 – 1874

Scottish advocate, judge and Tory politician

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About Duncan McNeill, 1st Baron Colonsay

Lived 1793 – 1874 (aged 80). Duncan McNeill, 1st Baron Colonsay was a British judge and politician.

Duncan McNeill, 1st Baron Colonsay FRSE (20 August 1793 – 31 January 1874) was a Scottish advocate, judge and Tory politician. He was Lord Justice General and Lord President of the Court of Session between 1852 and 1867.

His younger brother was the physician and diplomat Sir John McNeill.

Background and education McNeill was born on the island of Oronsay in the Inner Hebrides, the son of John McNeill (1767–1846), laird of Colonsay and Oronsay, and his wife Hester (née McNeill). Educated at St Andrew's University where he graduated MA in 1809..

He served his apprenticeship in Edinburgh under Michael Linning WS, based at 6 St James Square. He became a member of the Faculty of Advocates in 1816. He was the presumptive father of philosopher Edmund Montgomery.

Political, legal and judicial career He was Advocate Depute in Edinburgh 1820 to 1824.

MacNeill was appointed Sheriff of Perthshire in 1824. He served under Sir Robert Peel as Solicitor General for Scotland from 1834 to 1835 and again from 1841 to 1842 and as Lord Advocate from 1842 to 1846. From 1843 to 1851 he sat as Member of Parliament for Argyllshire. In 1851 he was appointed a Senator of the College of Justice and an Ordinary Lord of Session as Lord Colonsay and Oronsay. He was Lord Justice General and Lord President of the Court of Session from 1852 to 1867, and was raised to the peerage as Baron Colonsay, of Colonsay and Oronsay in the County of Argyll, on 26 February 1867.

Personal life

In 1829 he was elected a Fellow of the Royal Society of Edinburgh his proposer being John Shank More.

In later life Edinburgh University awarded him an honorary doctorate (LLD).

McNeill was unmarried, but lived in a very large Georgian townhouse: 73 Great King Street in Edinburgh's Second New Town.

He was a member of the Highland Society of Edinburgh (1833).

Lord Colonsay died at Pau, France, on 31 January 1874, aged 80, when the title became extinct.

He was interred at Warriston Cemetery in Edinburgh, south of the upper east–west path towards the East Gate. His bronze coat of arms has been stolen from the monument.

Coat of arms

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Important facts

Birth century
Occupation
Education
University of Edinburgh, University of St Andrews
Positions held
Member of the 15th Parliament of the United Kingdom, Member of the 14th Parliament of the United Kingdom, Sheriff of Perth
Awards
Fellow of the Royal Society of Edinburgh
Also known as
Duncan McNeill, 1st and last Baron Colonsay of Colonsay and Oronsay, 6th of Colonsay

People in Duncan McNeill, 1st Baron Colonsay's life

Named in this biography and alive at the same time

Contemporaries

People whose lives overlapped Duncan McNeill, 1st Baron Colonsay's

Frequently asked questions

Who was Duncan McNeill, 1st Baron Colonsay?

Scottish advocate, judge and Tory politician

When was Duncan McNeill, 1st Baron Colonsay born?

Duncan McNeill, 1st Baron Colonsay was born on 20 August 1793 in Oronsay.

When did Duncan McNeill, 1st Baron Colonsay die?

Duncan McNeill, 1st Baron Colonsay died on 31 January 1874 in Pau.

What was Duncan McNeill, 1st Baron Colonsay's occupation?

Duncan McNeill, 1st Baron Colonsay was a judge and politician.

What nationality was Duncan McNeill, 1st Baron Colonsay?

Duncan McNeill, 1st Baron Colonsay was British.

Sources & further reading

· Wikipedia: Duncan McNeill, 1st Baron Colonsay

· Wikidata: Q5314527

· DBpedia: Duncan McNeill, 1st Baron Colonsay

Cite this page

APA: Biography.guide. (2026). Duncan McNeill, 1st Baron Colonsay. https://biography.guide/duncan-mcneill-1st-baron-colonsay/

MLA: "Duncan McNeill, 1st Baron Colonsay." Biography.guide, https://biography.guide/duncan-mcneill-1st-baron-colonsay/.

Chicago: "Duncan McNeill, 1st Baron Colonsay." Biography.guide. https://biography.guide/duncan-mcneill-1st-baron-colonsay/.

Data last updated: 2026-09-21 · Spot an error? Report a correction.

Portrait: Wikimedia Commons · author & licence

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