List of monarchs of Thomond

Kings of Thomond
Kings of Thomond
Rí Tuamhain
	Map of Thomond, c. 11th century.
Details
Style	Rí Tuamhain
First monarch	Conchobhar Ó Briain
Last monarch	Murchadh Carrach Ó Briain
Formation	1118
Abolition	1543
Residence	Clonroad
Appointer	Tanistry

The kings of Thomond (Irish: Rí Tuamhain)^[1]^[2] ruled from the establishment of Thomond during the High Middle Ages, until the Early modern period. Thomond represented the legacy of Brian Bóruma and the High Kings of Ireland of his line who could not hold onto all of Munster, so had to partition the realm between themselves and Desmond, ruled by their rivals the Eóganachta. The Kings of Thomond were drawn from the leading kindred of the Dál gCais known as the Ó Briain. For centuries they fought off challenges from the Normans, including the de Clare family and internal conflict between factions. Eventually Murchadh Carrach Ó Briain decided to surrender and regrant his realm to the Kingdom of Ireland in 1543 and accepted the titles Baron Inchiquin and Earl of Thomond. These titles were recently held by Conor Myles John O'Brien (d.2023)

Kings of Thomond

Ó Briain, 1118-1277

Name	Birth	Marriage(s)	Death
Conchobhar Ó Briain 1118–1142	Son of Diarmuid Ó Briain	unknown	1142
Toirdhealbhach mac Diarmada Ua Briain 1142–1167	Son of Diarmuid Ó Briain	unknown	1167
Muircheartach mac Toirdelbhach Ó Briain 1167–1168	Son of Toirdelbhach mac Diarmaida Ó Briain	unknown	1168
Domhnall Mór Ó Briain^[3] 1168–1194	Son of Toirdelbhach mac Diarmaida Ó Briain	Orlacan Ní Murchada Four children	1194
Muircheartach Dall Ó Briain 1194–1198 1203–1210	Son of Domhnall Mór Ó Briain and Orlacan Ní Murchada	unknown	1210
Conchobhar Ruadh Ó Briain 1198–1203	Son of Domhnall Mór Ó Briain and Orlacan Ní Murchada	unknown	1203
Donnchadh Cairbreach Ó Briain 1210–1242	Son of Domhnall Mór Ó Briain and Orlacan Ní Murchada	unknown	1242
Conchobhar na Suidaine Ó Briain 1242–1268	Son of Donnchadh Cairbreach Ó Briain	unknown	1268
Brian Ruadh Ó Briain 1268–1276 1277	Son of Conchobhar na Suidaine Ó Briain	unknown	1277

Ó Briain Clann Tadhg, 1276-1311

Name	Portrait	Birth	Marriage(s)	Death
Toirdhealbhach Mór Ó Briain 1276–1306		Son of Tadhg Cael Uisce Ó Briain	unknown	1306
Donnchadh mac Toirdelbach Ó Briain 1306–1311		Son of Toirdelbach Ó Briain	unknown	1311

Ó Briain Clann Briain Ruadh, 1277-1284

Name	Portrait	Birth	Marriage(s)	Death
Donnchadh mac Brian Ruadh Ó Briain 1277–1284 (claimant)		Son of Brian Ruadh Ó Briain	unknown	1284

Ó Briain Clann Briain Ruadh, 1311-1317

Name	Portrait	Birth	Marriage(s)	Death
Diarmuid Cléirech Ó Briain 1311–1313		Son of Donnchadh mac Brian Ruadh Ó Briain	unknown	1313
Donnchadh mac Domhnall Ó Briain 1313–1317		Son of Domhnall mac Brian Ruadh Ó Briain and Mairéad Nic Mathghamhna	unknown	1317

Ó Briain Clann Tadhg, 1317-1343

Name	Portrait	Birth	Marriage(s)	Death
Muircheartach Ó Briain 1317–1343		Son of Toirdhealbhach Mór Ó Briain	Éadaoin Nic Gormáin Several children	1343

Ó Briain Clann Briain Ruadh, 1343-1350

Name	Portrait	Birth	Marriage(s)	Death
Brian Bán Ó Briain 1343–1350		Son of Domhnall mac Brian Ruadh Ó Briain and Mairéad Nic Mathghamhna	unknown	1350

Ó Briain Clann Tadhg, 1350-1543

Name	Birth	Marriage(s)	Death
Diarmuid mac Toirdelbach Ó Briain 1350–1360	Son of Toirdelbach Ó Briain	unknown	1360
Mathghamhain Maonmhaighe Ó Briain 1360–1369	Son of Muircheartach Ó Briain and Éadaoin Nic Gormáin	Úna Ní Conchubhair Several children	1369
Brian Sreamhach Ó Briain 1369–1400	Son of Mathghamhain Maonmhaighe Ó Briain and Úna Ní Conchubhair	Sláine Nic Con Mara Several children	1400
Toirdelbhach Maol Ó Briain 1375–1398 (claimant)	Son of Muircheartach Ó Briain and Éadaoin Nic Gormáin	unknown	1398
Conchobhar mac Mathghamhna Ó Briain 1400–1426	Son of Mathghamhain Maonmhaighe Ó Briain and Úna Ní Conchubhair	unknown	1426
Tadhg an Glemore Ó Briain 1426–1438	Son of Brian Sreamhach Ó Briain and Sláine Nic Con Mara	unknown	1438
Mathghamhain Dall Ó Briain 1438–1444	Son of Brian Sreamhach Ó Briain and Sláine Nic Con Mara	unknown	1444
Toirdhealbhach Bóg Ó Briain 1444–1459	Son of Brian Sreamhach Ó Briain and Sláine Nic Con Mara	Catherine Burke Several children	1459
Tadhg an Chomhaid Ó Briain 1459–1466	Son of Toirdhealbhach Bóg Ó Briain and Catherine Burke	Annabella Burke Several children	1466
Donnchadh mac Mathghamhna Ó Briain 1459–1461 (claimant)	Son of Mathghamhain Dall Ó Briain	unknown	1461
Conchobhar na Srona Ó Briain 1466–1496	Son of Toirdhealbhach Bóg Ó Briain	unknown	1496
Toirdelbhach Óg Ó Briain 1496–1498	Son of Toirdhealbhach Bóg Ó Briain and Catherine Burke	unknown	1498
Toirdhealbhach Donn Ó Briain 1498–1528	Son of Tadhg an Chomhaid Ó Briain and Annabella Burke	Raghnailt Nic Con Mara Several children Joan FitzMaurice Several children	1528
Conchobhar mac Toirdhealbaig Ó Briain 1528–1539	Son of Toirdelbhach Donn Ó Briain and Raghnailt Mac Con Mara	unknown	1539
Murchadh Carrach Ó Briain 1539–1543	Son of Toirdelbhach Donn Ó Briain and Raghnait MacNamara	Eleanor FitzGerald	1551