House of O'Brien: Difference between revisions

Latest revision as of 14:42, 21 February 2026

Coat of Arms
House of O'Brien
Dál gCais
Kings and Princes of Thomond
Ancient arms
House of O'Brien
Arms awarded in 1543 after submission to Henry VIII of England
House of O'Brien
Barons Ibrickane
Earls of Thomond

Dál gCais Branches
House of O'Grady
Lords of Cinel Dunghaile and Kilballyowen
Viscounts Guillamore
House of O'Kennedy
Lords of Ormond
High Chiefs of Ormond Upper and Ormond Lower
House of MacMahon
Lords of Corcabaskin
Marquises of Eguilly
Dukes of Magenta

Cadet Branches
House O'Brien of Inchiquin
Barons Inchiquin and Thomond
Barons O'Brien of Burren
Earls of Inchiquin
Marquesses of Thomond
Chiefs of O'Brien
Issued from Murrough O'Brien, 1st Earl of Thomond and 1st Baron Inchiquin, younger son of Turlough O'Brien, King of Thomond
House O'Brien of Leaghmenagh
Lords of Leamaneh Castle and Dromoland Castle
Baronets of Leaghmenagh
Barons Inchiquin
Issued from Donough O'Brien, younger son of Murrough O'Brien, 1st Earl of Thomond and 1st Baron Inchiquin
House O'Brien of Clare
Barons Moyarta
Viscounts Clare
Titular Earls of Thomond
Issued from Daniel O'Brien, younger son of Connor O'Brien, 3rd Earl of Thomond

Personal Arms
Turlogh O'Brien
Lord of Ibrickane
Son of Connor O'Brien, King of Thomond from his 2nd marriage
Uncle of Donough O'Brien, 2nd Earl of Thomond
Henry O'Brien
Lord Ibrackan
Son of Henry O'Brien, 7th Earl of Thomond from his 1st marriage
Predeceased his father

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 O'Brien Inchiquin.svg|House O'Brien of Inchiquin<br><span style="font-size:88%; line-height: 1.3em;">Barons Inchiquin and Thomond<br>Barons O'Brien of Burren<br>Earls of Inchiquin<br>Marquesses of Thomond<br>Chiefs of O'Brien<br>Issued from Murrough O'Brien, 1st Earl of Thomond and 1st Baron Inchiquin, younger son of Turlough O'Brien, King of Thomond</span><!-- Murrough O'Brien was the 3rd son of Turlough O'Brien, King of Thomond and younger brother of Connor O'Brien, last King of Thomond. After his brother died he inherited Thomond and after an agreement with the English crown he surrendered the title of King and was in turn created Earl of Thomond and Baron Inchiquin. Earldom was created by patent to his nephew and his heirs (son of his elder brother Connor) while Barony of Inchiquin was created in reminder to his heirs male -->
 O'Brien Leaghmenagh.svg|House O'Brien of Leaghmenagh<br><span style="font-size:88%; line-height: 1.3em;">Lords of Leamaneh Castle and Dromoland Castle<br>Baronets of Leaghmenagh<br>Barons Inchiquin<br>Issued from Donough O'Brien, younger son of Murrough O'Brien, 1st Earl of Thomond and 1st Baron Inchiquin</span><!-- Lucius O'Brien, 5th Baronet succeeded to the Barony of Inchiquin 13th Baron in 1855 -->
-O'Brien Clare.svg|House O'Brien of Clare<br><span style="font-size:88%; line-height: 1.3em;">Barons Moyarta<br>Viscounts Clare<br>Titular Earls of Thomond<br>Issued from Daniel O'Brien, younger son of Connor O'Brien, 3rd Earl of Thomond<br>Used undifferentiated arms of the family</span><!-- Daniel O'Brien, 3rd Viscount was attained and his titles forfeited in 1691 for his support to Jacobites. The branch fled to France where they lived until until extinction in 1774. From 1741 they also claimed the now extinct Earldom of Thomond but due to being attainted were not recognized -->
+O'Brien Clare.svg|House O'Brien of Clare<br><span style="font-size:88%; line-height: 1.3em;">Barons Moyarta<br>Viscounts Clare<br>Titular Earls of Thomond<br>Issued from Daniel O'Brien, younger son of Connor O'Brien, 3rd Earl of Thomond</span><!-- Daniel O'Brien, 3rd Viscount was attained and his titles forfeited in 1691 for his support to Jacobites. The branch fled to France where they lived until until extinction in 1774. From 1741 they also claimed the now extinct Earldom of Thomond but due to being attainted were not recognized -->
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