See also
| Husband: | Murrough O'Brien (1726-1808) | |
| Wife: | Mary Palmer (1750-1820) | |
| Marriage | 25 Jul 1792 | Beaconsfield, Buckinghamshire |
| Name: | Murrough O'Brien | |
| Sex: | Male | |
| Father: | - | |
| Mother: | - | |
| Birth | 1726 | Drogheda, Co. Louth, Ireland |
| Title | 1st Marquess of Thomond | |
| Death fact | 1808 (age 81-82) | Thrown from his horse in Grosvenor Square, London |
| Death | 10 Feb 1808 (age 81-82) | Grosvenor Square, London |
| Burial | 19 Feb 1808 | Taplow, Buckinghamshire |
| Name: | Mary Palmer | |
| Sex: | Female | |
| Father: | John Palmer (1708-1779) | |
| Mother: | Mary Reynolds (1716-1794) | |
| Birth | 4 Dec 1750 | Great Torrington, Devon |
| Death | 7 Sep 1820 (age 69) | Baylis House, Stoke Poges, Bucks |
Murrough O'Brien, 1st Marquess of Thomond KP, PC (Ire) (1726 – 1808), known from 1777 to 1800 as the 5th Earl of Inchiquin, was an Irish peer, soldier and politician.
Murrough O'Brien was born in 1726 to Hon. James O' Brien and Mary Jephson in Drogheda.
He joined the Grenadier Guards and was an officer in Germany, where he carried colours at the Battle of Lauffeld in 1747. He retired in 1756 and entered the Irish House of Commons for Clare in the following year. He represented the constituency until 1761 and sat then as Member of Parliament for Harristown until 1768.
Because of his support for the Act of Union of Great Britain and Ireland, on 29 December 1800 he was created Marquess of Thomond in the Peerage of Ireland, and Baron Thomond of Taplow in the Peerage of the United Kingdom on 2 October 1801 (which title allowed him to sit in the United Kingdom House of Lords). He had a close relationship with King George III. In 1783 he was one of the Founding Knights of the Order of St Patrick. His Irish seat was Rostellan, near Cork.
He was a drinker, called a "'six bottle man", and a gambler. He had a zest for life. He was a keen farmer and oversaw enclosure of lands around Taplow and mechanisation.
He married Mary O'Brien, 3rd Countess of Orkney (died 1790) in 1753, with whom he had a daughter, Mary O'Brien, 4th Countess of Orkney (1755–1831). He also is reputed to have had an illegitimate son, Thomas Carter (1767–1800), who was a popular singer in London during the 1790s. Thomas lived with Inchiquin at Taplow Court after his return from India in July 1789, and lent the earl all the money he earned in a benefit concert in Calcutta. In return, Inchiquin recommended Thomas to all his friends as a coal merchant.
Then in 1792, he married Mary Palmer, the niece and a beneficiary of Joshua Reynolds. She paid his debts.
He died after a fall from his horse in Grosvenor Square, London on 10 February 1808. The title of Marquess of Thomond passed to his nephew William O'Brien, 2nd Marquess of Thomond, The barony of Thomond became extinct.
http://en.wikipedia.org/wiki/Murrough_O%27Brien,_1st_Marquess_of_Thomond