| 0 |
- French, Conrad Fulke O'Brien, Marquess of Castelthomond |
| 0 |
- O'Brien, Charles, Earl of Thomond 9th |
| 0 |
- O'Brien, Charles, Earl of Thomond 10th |
| 0 |
- de Clifford, Thomas, Lord of Thomond |
| 0 |
- macLorcain, Cennétig of Thomond, King of Thomond |
| 1118 |
- O'Brien, Conchobar macDiarmata, King of Thomond |
| 1142 |
- O'Brien, Toirrdelbach macDiarmata, King of Thomond |
| 1168 |
- O'Brien, Donnell Mór macToirrdelbaig, King of Thomond & Munster |
| 1194 |
- Móir, Muirchertach Finn macDomnaill, King of Thomond |
| 1198 |
- Móir, Conchobar Ruad macDomnaill, King of Thomond |
| 1210 |
- Móir, Donnchad Cairprech macDomnail, King of Thomond |
| 1242 |
- macDonnchada, Conchobar Na Suidaine, King of Thomond |
| 1258 |
- O'Brien, Tedg Cáeluisce macConchobair, King of Thomond |
| 1268 |
- O'Brien, Brian Ruad macChonchbair, King of Thomond |
| 1276 |
- de Clare, Thomas, Lord of Thomond |
| 1277 |
- O'Brien, Donnchad macBrian Ruaid, King of Thomond |
| 1277 |
- O'Brien, Toirrdelbach macTaidg, King of Thomond |
| 1299 |
- de Clare, Gilbert, Lord Thomond |
| 1306 |
- O'Brian, Donnchad MacToirrdelbaig, King of Thomond |
| 1308 |
- de Clare, Richard, Lord Thomond |
| 1311 |
- O'Brien, Diarmait Cléirech macDonchada, King of Thomond |
| 1313 |
- O'Brien, Donnchad macDomnaill, King of Thomond |
| 1313 |
- O'Brien, Muirchertach macToirdelbaig, King of Thomond |
| 1343 |
- O'Brien, Brian Bán macDomnaill, King of Thomond |
| 1350 |
- O'Brian, Dairmaid macToirrdelbaig, King of Thomond |
| 1360 |
- O'Brien, Mathghamhain of Maonmhagh, King of Thomond |
| 1369 |
- O'Brien, Brian Sreamhach macMathghamhna, King of Thomond |
| 1375 |
- macMuirchertaigh, Toirdhealbhach Maol, King of Thomond |
| 1400 |
- O'Brien, Conchobhar macMathghamhna, King of Thomond |
| 1426 |
- O'Brien, Tadhg an Glemore macBrian, King of Thomond |
| 1438 |
- O'Brien, Mathghamhain Dall macBrian, King of Thomond |
| 1444 |
- macBrian, Toirdhealbhagh Bog the Soft, King of Thomond |
| 1459 |
- macToirdhealbhaig, Tadhg an Chomhaid, King of Thomond |
| 1459 |
- O'Brien, Donnchadh macMathghamhna Daill, King of Thomond |
| 1466 |
- O'Brien, Conchobhar Mór macToirdhealbhaig, King of Thomond |
| 1496 |
- macToirdhealbaig, Toirdhealbhach óg, King of Thomond |
| 1498 |
- O'Brien, Toirdhealbhach Donn macTaidhg, King of Thomond |
| 1528 |
- O'Brien, Conchobar macToirdhealbaig, King of Thomond |
| 1539 |
- macToirdhealbaig, Murchadh Carrach, King of Thomond |
It must be noted at this time, that the Kings of Thomond ended. The title
of Earl continued in Thomond |
| 1551 |
- O'Brien, Donnchadh the Fat macConchobhair, Earl of Thomond 2nd |
| 1553 |
- O'Brien, Conchobhar macDonnchadha, Earl of Thomond 3rd |
| 1581 |
- O'Brien, Donnchadh macConchobhair, Earl of Thomond 4th |
| 1624 |
- O'Brien, Henry macDonnchadha, Earl of Thomond 5th |
| 1639 |
- O'Brien, Barnabas macDonnchadha, Earl of Thomond 6th |
| 1657 |
- O'Brien, Henry, Earl of Thomond 7th |
| 1691 |
- O'Brien, Henry, Earl of Thomond 8th |
| 1756 |
- Wyndham-O'Brien, Percy, Earl of Thomond |
| 1800 |
- O'Brien, Murrough, Marquis of Thomond 1st |
| 1808 |
- O'Bryen, William, Marquis of Thomond 2nd |
| 1846 |
- O'Bryen, James, Marquis of Thomond 3rd |
| 1896 |
- French, Henry Albert, Marques of CastelThomond |
