Murrough McDermot O'Brien (c.1550 - 20 April 1573) was the 3rd Baron Inchiquin. He was the son of Dermod O'Brien, 2nd Baron Inchiquin and Margaret O'Brien and inherited his title in 1557 on the death of his father.
He married Margaret Cusack, daughter of Sir Thomas Cusack of Cussington, Meath, Lord Chancellor of Ireland and his second wife Maud Darcy.
He was murdered in 1573 by Dermot O'Shaughnessey, supposedly at the instigation of Ulick Burke, 3rd Earl of Clanricarde. [1]
He was succeeded by his son, Murrough O'Brien, 4th 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 claimed descent from Brian Boru, a High King of Ireland. The English titles were granted under the policy of surrender and regrant, and therefore conditional upon the abandonment of any Irish titles, the adoption of English customs and laws, pledging of allegiance to the Crown, apostasy from the Catholic Church, and conversion to the Church of Ireland. Murrough was made both Earl of Thomond in the Peerage of Ireland, with remainder to his nephew Donough O'Brien and Baron Inchiquin, with remainder to his male heirs. Following the death of his cousin, Conor Myles John O' Brien in June 2023, Conor John Anthony O' Brien is currently the 19th Baron Inchiquin
Sir Murrough O'Brien, 5th Baron O'Brien of Burren, 1st Baron Thomond of Taplow, 10th Baron & 5th Earl of Inchiquin, 1st Marquess of Thomond KP, PC (Ire), known from 1777 to 1800 as the 5th Earl of Inchiquin, was an Irish peer, soldier, politician, and Chief of Clan O'Brien.
The title of Baron O'Brien has been created twice, once in the Peerage of Ireland and once in the Peerage of the United Kingdom.
Earl of Thomond was an hereditary title in the Peerage of Ireland. It was created twice for the O'Brien dynasty which is an ancient Irish sept native to north Munster.
Murrough O'Brien, 1st Baron of Inchiquin, 1st Earl of Thomond was an Irish peer, Chief of Clan O'Brien, and the last King of Thomond.
Lucius (McEdward) O'Brien, 13th Baron Inchiquin, known as Sir Lucius O'Brien, 5th Baronet from 1837 to 1855, was an Irish politician and nobleman. He is remembered respectfully in County Clare for his relief work in the famine years.
William O'Brien, 2nd Marquess of Thomond, 6th Earl of Inchiquin, 1st Baron Tadcaster KP PC (I) was an Irish peer and Chief of Clan O'Brien. He succeeded by special remainder as Marquess of Thomond in 1808 on the death of his uncle Murrough O'Brien, 1st Marquess of Thomond and was appointed a Privy Councillor and Knight of the Order of St Patrick on 11 November 1809. He was created Baron Tadcaster in the British Peerage in 1826.
Edward Donough O'Brien, 14th Baron Inchiquin KP was the holder of a hereditary peerage in the Peerage of Ireland, as well as Chief of the Name of O'Brien and Prince of Thomond in the Gaelic Irish nobility. In 1862, he was appointed High Sheriff of Clare.
Richard Southwell was an Irish politician.
Connor O'Brien, 3rd Earl of Thomond also spelt Conor and called Groibleach, or the "long-nailed", contended with his uncle Donnell for the Chieftainship of Clan O'Brien from 1535 to 1565. He was confirmed as 3rd Earl of Thomond in 1558 by the Lord Deputy of Ireland, Thomas Radclyffe, 3rd Earl of Sussex. O'Brien intrigued with fitz Maurice in 1569 during the 1st Desmond Rebellion and fled to France. He returned and was pardoned in 1571, being restored to his lands at the end of the rebellion in 1573.
William O'Brien, 3rd Baron O'Brien of Burren, 8th Baron & 3rd Earl of Inchiquin PC was an Irish nobleman.
Lucius William O'Brien, 15th Baron Inchiquin was the England-born holder of a hereditary peerage in the Peerage of Ireland, as well as Chief of the Name of O'Brien and Prince of Thomond in the Gaelic Irish nobility.
Murrough MacMurrough O'Brien, 4th Baron of Inchiquin was the son of Murrough McDermot O'Brien, 3rd Baron Inchiquin and Margaret Cusack, daughter of Sir Thomas Cusack of Cussington, Meath, Lord Chancellor of Ireland and his second wife Maud Darcy.
Dermod McMurrough O'Brien was the 2nd Baron Inchiquin. He was the son of Murrough O'Brien, 1st Earl of Thomond and Eleanor FitzGerald. O'Brien married Margaret O'Brien, daughter of Donough O'Brien, 2nd Earl of Thomond.
Dermod Ruadh O'Brien, 5th Baron of Inchiquin was an Irish baron.
There were six early Barons Inchiquin in Ireland between 1543 and 1654. The title was granted to Murrough O'Brien, the brother of Conor O'Brien, King of Thomond, when he surrendered his Irish royalty to King Henry VIII in 1543. His descendants held the title until 1654, when Murrough O'Brien, 6th Baron Inchiquin was created Earl of Inchiquin.
Donough O'Brien, 2nd Earl of Thomond, also known as "the fat", was the son of Connor O'Brien, King of Thomond and Annabell Burke. He inherited the earldom from his uncle, Murrough O'Brien, by special remainder.
Events from the year 1543 in Ireland.
The O'Brien dynasty was an Irish Clan and noble house of Munster, founded in the 10th century by Brian Boru of the Dál gCais (Dalcassians). After becoming King of Munster, through conquest he established himself as Ard Rí na hÉireann. Brian's descendants thus carried the name Ó Briain, continuing to rule the Kingdom of Munster until the 12th century where their territory had shrunk to the Kingdom of Thomond which they would hold for just under five centuries.
Murrough may refer to:
Leigh Rayment's Peerage Pages [ self-published source ][ better source needed ]