The title Baron Inchiquin is one of the older titles in the Peerage of Ireland. It was created in 1543 for Murrough O'Brien, Prince of Thomond, along with the Earldom of Thomond, which passed by a special remainder on his death to his nephew and later became extinct. In 1654 the 6th Baron was created Baron O'Brien and Earl of Inchiquin, and in 1800 the 5th Earl was created Marquess of Thomond. In 1801 the 1st Marquess of Thomond was further created Baron Thomond, of Taplow in the County of Buckingham, in the Peerage of the United Kingdom to allow him to sit in the House of Lords. The Barony of Thomond (not created with the special remainder attached to the Marquessate) became extinct on the death of the 1st Marquess in 1808, but his nephew and successor, the 2nd Marquess, was created Baron Tadcaster, of Tadcaster in the County of York, in 1826. This peerage became extinct on his death in 1826. All the remaining peerages except the original Barony of Inchiquin (the Marquessate of Thomond, Earldom of Inchiquin and Barony of Brien) became extinct on the death of the 3th Marquess in 1855. The Peerage of Ireland is the term used for those peers created by British monarchs in their capacity as Lord or King of Ireland. ... // Events February 21 - Battle of Wayna Daga - A combined army of Ethiopian and Portuguese troops defeat the armies of Adal led by Ahmed Gragn. ... Events April 5 - Signing of the Treaty of Westminster, ending the First Anglo-Dutch War. ... 1800 was a common year starting on Wednesday (see link for calendar). ... 1801 was a common year starting on Thursday (see link for calendar). ... The Peerage of the United Kingdom comprises most peerages created in the United Kingdom of Great Britain and Ireland after the Act of Union in 1801. ... This article is about the British House of Lords. ... 1808 was a leap year starting on Friday (see link for calendar). ... 1826 was a common year starting on Sunday (see link for calendar). ... 1826 was a common year starting on Sunday (see link for calendar). ... 1855 was a common year starting on Monday (see link for calendar). ...

In the Gaelic nobility, Lord Inchiquin continues to be The O'Brien, Chief of the Name, Prince of Thomond.

Barons Inchiquin (1543)

• Murrough O'Brien, 1st Earl of Thomond, 1st Baron Inchiquin (d. 1551)
• Dermod O'Brien, 2nd Baron Inchiquin (d. 1557)
• Murrough McDermot O'Brien, 3rd Baron Inchiquin (1550-1574)
• Murrough O'Brien, 4th Baron Inchiquin (1563-1597)
• Dermod O'Brien, 5th Baron Inchiquin (1594-1624)
• Murrough O'Brien, 1st Earl of Inchiquin, 6th Baron Inchiquin (1618-1674)
• William O'Brien, 2nd Earl of Inchiquin, 7th Baron Inchiquin (1640-1692)
• William O'Brien, 3rd Earl of Inchiquin, 8th Baron Inchiquin (1662-1719)
• William O'Brien, 4th Earl of Inchiquin, 9th Baron Inchiquin (1700-1777)
• William O'Brien, 1st Marquess of Thomond, 5th Earl of Inchiquin, 10th Baron Inchiquin, 1st Baron Thomond (1726-1808)
• William O'Brien, 2nd Marquess of Thomond, 6th Earl of Inchiquin, 11th Baron Inchiquin, 1st Baron Tadcaster (1765-1846), elected a Representative Peer in 1816
• James O'Brien, 3rd Marquess of Thomond, 7th Earl of Inchiquin, 12th Baron Inchiquin (1768-1855)
• Lucius O'Brien, 13th Baron Inchiquin (1800-1872), elected a Representative Peer in 1863
• Edward Donough O'Brien, 14th Baron Inchiquin (1839-1900), elected a Representative Peer in 1873
• Lucius William O'Brien, 15th Baron Inchiquin (1864-1929), elected a Representative Peer in 1900
• Donough Edward Foster O'Brien, 16th Baron Inchiquin (1897-1968)
• Phaedrig Lucius Ambrose O'Brien, 17th Baron Inchiquin (1900-1982)
• Conor Myles John O'Brien, 18th Baron Inchiquin (b. 1943)

Heir Presumptive: Major Murrough Richard O'Brien (b. 1910) (a grandson of the 14th Baron and Lord Inchiquin's first cousin once removed) // Events February 21 - Battle of Wayna Daga - A combined army of Ethiopian and Portuguese troops defeat the armies of Adal led by Ahmed Gragn. ... Events Russia, Reforming Synod of the metropolite Macaire, Orthodoxy: introduction of a calendar of the saints and an ecclesiastical law code ( Stoglav ) Major outbreak of the sweating sickness in England. ... Events Spain is effectively bankrupt. ... Events February 7 - Julius III becomes Pope. ... Events April 14 - Battle of Mookerheyde. ... Events February 1 - Sarsa Dengel succeeds his father Menas as Emperor of Ethiopia February 18 - The Duke of Guise is assassinated while besieging Orléans March - Peace of Amboise. ... Events 17 January - A court case in Guildford recorded evidence that a certain plot of land was used for playing “kreckett” (i. ... Events February 27 - Henry IV is crowned King of France at Rheims. ... Events January 24 - Alfonso Mendez, appointed by Pope Gregory XV as Prelate of Ethiopia, arrives at Massawa from Goa. ... Events March 8 - Johannes Kepler discovers the third law of planetary motion (he soon rejects the idea after some initial calculations were made but on May 15 confirms the discovery). ... Events February 19 - England and the Netherlands sign the Treaty of Westminster. ... Events December 1 - Portugal regains its independence from Spain and João IV of Portugal becomes king. ... Events February 13 - Massacre of Glencoe March 1 - The Salem witch trials begin in Salem Village, Massachusetts Bay Colony with the charging of three women with witchcraft. ... Events March 18 – Short-timed experiment of the first public buses holding 8 passengers begins in Paris May 3/May 2 - Catherine of Braganza marries Charles II of England – as part of the dowry, Portugal cedes Bombay and Tangier to England May 9 - Samuel Pepys witnessed a Punch and Judy... // Events January 23 - The Principality of Liechtenstein is created within the Holy Roman Empire April 25 - Daniel Defoe publishes Robinson Crusoe June 10 - Battle of Glen Shiel Prussia conducts Europes first systematic census Miners in Falun, Sweden find an apparently petrified body of Fet-Mats Israelsson in an unused... Events January 1 - Russia accepts Julian calendar. ... 1777 was a common year starting on Wednesday (see link for calendar). ... Events George Friderich Handel becomes a British subject. ... 1808 was a leap year starting on Friday (see link for calendar). ... 1765 was a common year starting on Tuesday (see link for calendar). ... 1846 was a common year starting on Thursday (see link for calendar). ... 1768 was a leap year starting on Friday (see link for calendar). ... 1855 was a common year starting on Monday (see link for calendar). ... 1800 was a common year starting on Wednesday (see link for calendar). ... 1872 was a leap year starting on Monday (see link for calendar). ... 1839 was a common year starting on Tuesday (see link for calendar). ... 1900 is a common year starting on Monday. ... 1864 was a leap year starting on Friday (see link for calendar). ... 1929 was a common year starting on Tuesday (link will take you to calendar). ... 1897 was a common year starting on Friday (see link for calendar). ... 1968 (MCMLXVIII) was a leap year starting on Monday (the link is to a full 1968 calendar). ... 1900 is a common year starting on Monday. ... 1982 (MCMLXXXII) is a common year starting on Friday of the Gregorian calendar. ... 1943 is a common year starting on Friday. ... 1910 was a common year starting on Saturday (see link for calendar). ...