Sir Timothy O'Brien, 1st Baronet (1787 – 3 December 1862) was an Irish Whig,

Independent Irish Party The Independent Irish Party (IIP) was the designation chosen by the 48 Members of the United Kingdom Parliament returned from Ireland with the endorsement of the Tenant Right League in the 1852 general election. The League had secured their ...

and

Repeal Association The Repeal Association was an Irish mass membership political movement set up by Daniel O'Connell in 1830 to campaign for a repeal of the Acts of Union of 1800 between Great Britain and Ireland. The Association's aim was to revert Ireland to ...

politician, and merchant. He was the son of Timothy O'Brien and his wife (née Madden). In 1821, he married Catherine Murphy, daughter of Edward Murphy, and they had at least five children: Timothy (died 1869); John (died 1869); Kate (died 1894); Ellen (died 1899); and

Patrick Patrick may refer to: *Patrick (given name), list of people and fictional characters with this name * Patrick (surname), list of people with this name People *Saint Patrick (c. 385–c. 461), Christian saint * Gilla Pátraic (died 1084), Patrick ...

(1823–1895). In 1844, O'Brien was made

Lord Mayor of Dublin The Lord Mayor of Dublin () is the honorary title of the chairperson ( ) of Dublin City Council which is the local government body for the city of Dublin, the capital of Ireland. The incumbent, since December 2024, is Fine Gael councillor Emma ...

, a position he again held in 1849. Simultaneously, he was a Member of Parliament (MP), first elected as a Repeal Association member for

Cashel Cashel (an Anglicised form of the Irish language word ''Caiseal'', meaning "stone fort") may refer to: Places in Ireland *Cashel, County Tipperary **The Rock of Cashel, an ancient, hilltop fortress complex for which Cashel is named ** Archbishop ...

at a by-election in 1846—caused by the resignation of Joseph Stock. Becoming an Independent Irish MP in 1852 and a Whig in 1857, he held the seat until the 1859 general election, when he did not seek re-election. In 1849, during

Queen Victoria Victoria (Alexandrina Victoria; 24 May 1819 – 22 January 1901) was Queen of the United Kingdom of Great Britain and Ireland from 20 June 1837 until Death and state funeral of Queen Victoria, her death in January 1901. Her reign of 63 year ...

's first visit to Ireland, O'Brien was made a baronet, becoming 1st baronet of Merrion Square and Boris-in-Ossory. Upon his own death in 1862, the baronetcy was inherited by his son, Patrick O'Brien. Outside of his political career, O'Brien was also a Justice of the Peace and a Deputy Lieutenant.

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* {{DEFAULTSORT:OBrien, Timothy 1787 births 1862 deaths Whig (British political party) MPs for Irish constituencies Irish Repeal Association MPs Members of the Parliament of the United Kingdom for County Tipperary constituencies (1801–1922) Baronets in the Baronetage of the United Kingdom Lord mayors of Dublin Irish justices of the peace Deputy lieutenants in Ireland UK MPs 1841–1847 UK MPs 1847–1852 UK MPs 1852–1857 UK MPs 1857–1859 Irish knights