There have been four baronetcies created for persons with the surname O'Brien, one in the

Baronetage of Ireland Baronets are a rank in the British aristocracy. The current Baronetage of the United Kingdom has replaced the earlier but existing Baronetages of England, Nova Scotia, Ireland, and Great Britain. Baronetage of England (1611–1705) James I of E ...

and three in the

Baronetage of the United Kingdom Baronets are a rank in the British aristocracy. The current Baronetage of the United Kingdom has replaced the earlier but existing Baronetages of England, Nova Scotia, Ireland, and Great Britain. Baronetage of England (1611–1705) James I of E ...

. The O'Brien Baronetcy, of Leaghmenagh in the County of Clare, was created in the Baronetage of Ireland on 9 November 1686; for more information see

Baron Inchiquin Baron Inchiquin () is one of the older titles in the Peerage of Ireland. It was one of two titles created on 1 July 1543 for Murrough O'Brien, Prince of Thomond, who was descended from the great high king Brian Boru. The grant of the English ti ...

. The O'Brien Baronetcy, of

Merrion Square Merrion Square () is a Georgian garden square on the southside of Dublin city centre. History The square was laid out in 1752 by the estate of Viscount FitzWilliam and was largely complete by the beginning of the 19th century. The demand for ...

in Dublin and Boris-in-Ossory in Queen's County, was created in the

on 25 September 1849 for Timothy O'Brien. He was a merchant,

Lord Mayor of Dublin The Lord Mayor of Dublin ( ga, Ardmhéara Bhaile Átha Cliath) is the honorary title of the chairperson ( ga, Cathaoirleach, links=no ) of Dublin City Council which is the local government body for the city of Dublin, the capital of Ireland. The ...

and

Liberal Liberal or liberalism may refer to: Politics * a supporter of liberalism ** Liberalism by country * an adherent of a Liberal Party * Liberalism (international relations) * Sexually liberal feminism * Social liberalism Arts, entertainment and m ...

Member of Parliament A member of parliament (MP) is the representative in parliament of the people who live in their electoral district. In many countries with bicameral parliaments, this term refers only to members of the lower house since upper house members of ...

for Cashel. The second Baronet represented King's County in the

House of Commons The House of Commons is the name for the elected lower house of the bicameral parliaments of the United Kingdom and Canada. In both of these countries, the Commons holds much more legislative power than the nominally upper house of parliament. ...

as a Liberal for over thirty years. The third Baronet was

Lord Lieutenant A lord-lieutenant ( ) is the British monarch's personal representative in each lieutenancy area of the United Kingdom. Historically, each lieutenant was responsible for organising the county's militia. In 1871, the lieutenant's responsibility ...

County Cork County Cork ( ga, Contae Chorcaí) is the largest and the southernmost county of Ireland, named after the city of Cork, the state's second-largest city. It is in the province of Munster and the Southern Region. Its largest market towns are ...

. In 2017 the seventh and present Baronet (Devin James Connor O’Brien) claimed succession and was listed in the Official Roll of the Baronetage. The baronetcy was considered temporarily dormant from 2013 to 2017 while this claim was verified. For more information, follow thi
link.
The O'Brien Baronetcy was created in the Baronetage of the United Kingdom on 28 September 1891; for more information see Baron O'Brien. The O'Brien Baronetcy was created in the Baronetage of the United Kingdom on 15 January 1916; for more information see

Baron Shandon Baron is a rank of nobility or title of honour, often hereditary, in various European countries, either current or historical. The female equivalent is baroness. Typically, the title denotes an aristocrat who ranks higher than a lord or knig ...

O'Brien baronets of Leaghmenagh (1686)

*see

O'Brien baronets, of Merrion Square and Boris-in-Ossory (1849)

Holders and intermittent generations: * Sir Timothy O'Brien, 1st Baronet (1787–1862) *

Sir Patrick O'Brien, 2nd Baronet Sir Patrick O'Brien, 2nd Baronet (1823 – 26 April 1895) was an Irish politician. He was elected in 1852 as a member of parliament for King's County (now County Offaly), and held the seat until the constituency was divided at the 1885 genera ...

(1823–1895) * Sir Timothy Carew O'Brien, 3rd Baronet (1861–1948) *Sir Robert Rollo Gillespie O'Brien, 4th Baronet (1901–1952) *Sir John Edmond Noel O'Brien, 5th Baronet (1899–1969) *Sir David Edmond O'Brien, 6th Baronet (1902–1982) **John David O'Brien (1928–1980) ***Timothy John O'Brien (1958-) ''The baronetcy is presently considered Dormant as the present holder has not proven his claim to the title.'' ''The

heir presumptive An heir presumptive is the person entitled to inherit a throne, peerage, or other hereditary honour, but whose position can be displaced by the birth of an heir apparent or a new heir presumptive with a better claim to the position in question. ...

after the presumed-only holder is the other patrilineal grandson of the 6th Baronet, James Patrick O'Brien (born 1964).''

O'Brien baronets (1891)

*see Baron O'Brien

O'Brien baronets (1916)

*see

Notes

References