William O'Brien, 2nd Marquess of Thomond, 6th Earl of Inchiquin, 1st Baron Tadcaster KP PC (I) (176521 August 1846) was an Irish peer. He succeeded by special remainder as

Marquess of Thomond A marquess (; french: marquis ), es, marqués, pt, marquês. is a nobleman of high hereditary rank in various European peerages and in those of some of their former colonies. The German language equivalent is Markgraf (margrave). A woman wi ...

in 1808 on the death of his uncle

Murrough O'Brien, 1st Marquess of Thomond Sir Murrough O'Brien, 10th Baron of Inchiquin, 5th Baron O'Brien of Burren, 1st Baron Thomond of Taplow, 5th Earl of Inchiquin, 1st Marquess of Thomond KP, PC (Ire) (1726 – 10 February 1808), known from 1777 to 1800 as the 5th Earl of Inchiqui ...

and was appointed a Privy Councillor and Knight of the

Order of St Patrick The Most Illustrious Order of Saint Patrick is a dormant British order of chivalry associated with Ireland. The Order was created in 1783 by King George III at the request of the then Lord Lieutenant of Ireland, The 3rd Earl Temple (later cre ...

on 11 November 1809. He was created Baron Tadcaster in the British Peerage in 1826.

Early life

O'Brien was born in

Ennistymon Ennistymon or Ennistimon () is a country market town in County Clare, near the west coast of Ireland. The River Inagh, with its small rapids known as the Cascades, runs through the town, behind the main street. A bridge across the river leads to ...

, County Clare, to Captain

Edward Dominic O'Brien Captain Edward Dominic O'Brien (1735 - 1 March 1801) was an Irish law enforcement official and British Army officer. Life Edward Dominic O'Brien was the son of Capt. James O'Brien, M.P. for Youghal, and Mary Jephson. He was born in 1735 at Droghe ...

High Sheriff of Clare The High Sheriff of Clare was a High Sheriff title. Records show that the title was in existence from at least the late 16th century, though it is not used today in the modern Republic of Ireland. The title existed within County Clare in the west ...

and Mary Carrick, daughter of Christopher Carrick and Áine McNally. His father was the grandson of

William O'Brien, 3rd Earl of Inchiquin William MacWilliam O'Brien, 8th Baron of Inchiquin, 3rd Baron O'Brien of Burren, 3rd Earl of Inchiquin PC (1662 – 24 December 1719) was an Irish nobleman. Life William O'Brien was the son of William O'Brien, 2nd Earl of Inchiquin and Lady M ...

Death and succession

On his death in 1846 his title passed by the same special remainder to his brother

James O'Brien, 3rd Marquess of Thomond Admiral James McEdward O'Brien, 3rd Marquess of Thomond, GCH (1769–1855), styled Lord James O'Brien from 1809 to 1846, was a British naval officer. O'Brien, born in 1769, was third son of Edward Dominic O'Brien, captain in the army (d. 1801). ...

Family

William O'Brien married Elizabeth Rebecca Trotter (1775–1852), daughter of Thomas Trotter of Duleek, Co. Meath on 16 September 1799. They had no son but four daughters: *Susan Maria married Captain later Rear-Admiral George Frederick Hotham RN and they were parents of Charles 4th Lord Hotham *Sarah married Major William Stanhope Taylor *Mary married Richard White, Viscount Berehaven who succeeded as 2nd Earl of Bantry *Elizabeth married George Stucley Bucke who in 1859 was made Sir George Stucley Stucley, 1st Baronet

References

{{DEFAULTSORT:Thomond, William O'Brien, 2nd Marquess of 1765 births 1846 deaths 18th-century Irish people 19th-century Irish people Irish representative peers Knights of St Patrick Members of the Privy Council of Ireland

William William is a male given name of Germanic origin.Hanks, Hardcastle and Hodges, ''Oxford Dictionary of First Names'', Oxford University Press, 2nd edition, , p. 276. It became very popular in the English language after the Norman conquest of Engl ...

Marquesses of Thomond Peers of the United Kingdom created by George IV Irish chiefs of the name