Amelia Osborne, Marchioness of Carmarthen

Last updated
Amelia, Marchioness of Carmarthen
Francois-Hubert Drouais - Lady Amelia Darcy, 9th Baroness Conyers (1754-1784).jpg
Amelia Osborne, painted by François-Hubert Drouais
Lady Amelia Darcy

(1754-10-12)12 October 1754
Died27 January 1784(1784-01-27) (aged 29)
Children George Osborne, 6th Duke of Leeds
Mary Pelham, Countess of Chichester
Francis Osborne, 1st Baron Godolphin
Augusta Leigh
Parent(s) Robert Darcy, 4th Earl of Holderness
Mary Doublet

Amelia Osborne, Marchioness of Carmarthen, 12th Baroness Darcy de Knayth, 9th Baroness Conyers, 5th Countess of Mértola (néeDarcy; 12 October 1754 27 January 1784), was a British peer and a Portuguese countess.


She was the only surviving child of Robert Darcy, 4th Earl of Holderness, and his wife, the former Mary Doublet. On 29 November 1773, she married Francis Osborne, Marquess of Carmarthen, in London, [1] and they had three children:

The marchioness's portrait was painted in about 1764 by François-Hubert Drouais. [2]

On 16 May 1778, Amelia succeeded to the titles of 12th Baroness Darcy de Knayth and 9th Baroness Conyers in her own right, as the only surviving child of her father. Her right to the baronies of Darcy de Knayth and Conyers were eventually confirmed in 1798 (long after her death), and she also inherited the Portuguese countship of Mértola from him.

Lord and Lady Carmarthen divorced in May 1779. It was said that the marchioness had become over-friendly with John "Mad Jack" Byron (father of the poet, Lord Byron), who visited her at home in Grosvenor Square when her husband was absent, and that they had been having an affair. [3] [4] Almost immediately after the divorce, she married Byron. They had one daughter, Augusta Leigh.

A year after the birth of her daughter by a year, in 1784, Amelia died [5] and the titles were inherited by her eldest son, George.

Related Research Articles

Francis Osborne, 5th Duke of Leeds British politician

Francis Godolphin Osborne, 5th Duke of Leeds,, styled Marquess of Carmarthen until 1789, was a British politician. He notably served as Foreign Secretary under William Pitt the Younger from 1783 to 1791. He also was Governor of Scilly. As a statesman he is generally regarded as a failure, and his deep hostility to the newly independent United States of America damaged relations between the two countries.

Robert Darcy, 4th Earl of Holderness British diplomat

Robert Darcy, 4th Earl of Holderness,, known before 1721 as Lord Darcy and Conyers, was a British diplomat and politician.

Baron Darcy de Knayth is a title in the Peerage of England. It was created in 1332 for John Darcy with remainder to his heirs general, allowing daughters to inherit.

Duke of Leeds title in the Peerage of England

Duke of Leeds was a title in the Peerage of England. It was created in 1694 for the prominent statesman Thomas Osborne, 1st Marquess of Carmarthen due to being on the Immortal Seven in the Revolution of 1688. He had already succeeded as 2nd Baronet, of Kiveton (1647) and been created Viscount Osborne, of Dunblane (1673), Baron Osborne, of Kiveton in the County of York and Viscount Latimer, of Danby in the County of York, Earl of Danby, in the County of York (1674), and Marquess of Carmarthen (1689). All these titles were in the Peerage of England, except for the viscountcy of Osborne, which was in the Peerage of Scotland. He resigned the latter title in favour of his son in 1673. The Earldom of Danby was a revival of the title held by his great-uncle, Henry Danvers, 1st Earl of Danby.

Baron Fauconberg is an hereditary title created twice in the Peerage of England.

Baron Conyers

Baron Conyers is a title in the Peerage of England. It was created on 17 October 1509 for William Conyers, the son-in-law of William Neville, 1st Earl of Kent. The abeyance after the death of the 3rd baron was terminated for the 7th Baron Darcy de Knayth, these baronies were held together until the abeyance of 1888, after which the abeyance of these two baronies were separately terminated. Since 1509, the Barons Conyers had held a part of the "right" to the barony Fauconberg, i.e. the part for which the abeyance was terminated in 1903; and since the termination of the abeyance of the barony Fauconberg, the two baronies, Conyers and Fauconberg, had been held together; from 1948 they were abeyant between the two daughters of the 5th Earl of Yarborough. On the death of the younger daughter in 2012 the abeyance terminated automatically in favour of her elder sister, the 15th holder of the title. Since the death of the latter in 2013, the title is in abeyance once more.

George Osborne, 6th Duke of Leeds British noble

George William Frederick Osborne, 6th Duke of Leeds,, styled Earl of Danby until 1789 and Marquess of Carmarthen from 1789 to 1799, was a British peer and politician. He served as Master of the Horse between 1827 and 1830. He also was Governor of Scilly.

Marcia Pelham, Countess of Yarborough British countess

Marcia Amelia Mary Pelham, Countess of Yarborough and 13th Baroness Conyers and 7th Baroness Fauconberg, OBE was a British peer who worked in politics for the Conservative Party.

Violet Herbert, Countess of Powis British countess

Violet Ida Eveline Herbert, Countess of Powis and suo jure16th Baroness Darcy de Knayth was a British peeress in her own right.

The title Count of Mértola was granted to Frederick, 1st Duke of Schomberg by Afonso VI of Portugal, in 1663, as a reward for the Duke's service with the Portuguese Army.

Hornby Castle, North Yorkshire Grade I listed castle in Richmondshire, United Kingdom

Hornby Castle is a grade I listed fortified manor house on the edge of Wensleydale between Bedale and Leyburn, in the county of North Yorkshire, England.

Francis DArcy-Osborne, 7th Duke of Leeds British politician

Francis George Godolphin D'Arcy D'Arcy-Osborne, 7th Duke of Leeds, styled Earl of Danby from birth until 1799 and Marquess of Carmarthen from 1799 until 1838, was a British peer and politician.

Sackville George Lane-Fox, 12th Baron Conyers and de jure 15th Baron Darcy de Knayth was a British peer and soldier.

Robert Darcy, 3rd Earl of Holderness English noble

Robert Darcy, 3rd Earl of Holderness, was a British peer and politician.

Frederica Mildmay, Countess of Mértola British countess

Frederica Susanna Mildmay, Countess FitzWalter, 3rd Countess of Mértola was a British peeress.

John Byron (British Army officer) British Army officer and writer

Captain John Byron was a British Army officer and letter writer, best known as the father of the poet Lord Byron. In 1824, an obituary of his son gave him the nickname "Mad Jack Byron", and though there is no evidence for this in his own lifetime, it has since stuck – certainly he was called "Jack" by his family members and referred to himself as such.

George Osborne, 8th Duke of Leeds British peer

Sir George Godolphin Osborne, 8th Duke of Leeds was a British peer.

Charlotte Paget, Marchioness of Anglesey, formerly Lady Charlotte Wellesley, formerly Lady Charlotte Cadogan, was the second wife of Henry Paget, 1st Marquess of Anglesey.

Mary Darcy, Countess of Holderness English countess

Mary Darcy, Countess of Holderness, formerly Mary Doublet, was the wife of Robert Darcy, 4th Earl of Holderness.

Mary Pelham, Countess of Chichester (1776-1862)

Mary Pelham, Countess of Chichester, formerly Lady Mary Henrietta Juliana Osborne, was the wife of Thomas Pelham, 2nd Earl of Chichester.


  1. L. G. Pine, The New Extinct Peerage 1884-1971: Containing Extinct, Abeyant, Dormant and Suspended Peerages With Genealogies and Arms (London, U.K.: Heraldry Today, 1972), page 174.
  2. "Portrait of Lady Amelia Darcy". artnet. Retrieved 1 February 2018.
  3. Lawbook Exchange Ltd (1779). Trials for Adultery, Or, The History of Divorces. The Lawbook Exchange, Ltd. pp. 10–. ISBN   978-1-58477-468-6.
  4. George Gordon Byron Baron Byron (2015). Byron's Letters and Journals: A New Selection. Oxford University Press. ISBN   978-0-19-872255-7.
  5. The International Monthly Magazine of Literature, Science, and Art. Stringer & Townsend. 1852. pp. 142–.
Portuguese nobility
Preceded by
Robert Darcy
Countess of Mértola
Succeeded by
George Osborne
Peerage of England
Preceded by
Robert Darcy
Baroness Darcy de Knayth
Succeeded by
George Osborne
Baroness Conyers