William (4th Earl of Inchiquin) O'brien
1694 - 1777 (83 years)
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| Mary (Countess of Orkney) O'brien 1733-Yes, date unknown |
| Mary (Countess of Orkney) O'brien | |
| B: | 12 Jan 1733 |
| D: | Yes, date unknown |
| William Lord O'brien 1725-Yes, date unknown |
| William Lord O'brien | |
| B: | 1725 |
| D: | Yes, date unknown |
| George Lord O'brien 1727-Yes, date unknown |
| George Lord O'brien | |
| B: | 8 Aug 1727 |
| D: | Yes, date unknown |
| Murrough (4th Viscount Kirkwall) O'brien 1731-1741 |
| Murrough (4th Viscount Kirkwall) O'brien | |
| B: | Nov 1731 |
| D: | 20 Sep 1741 |
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| William (4th Earl of Inchiquin) O'brien 1694-1777 |
| William (4th Earl of Inchiquin) O'brien | |
| B: | 1694 |
| D: | 18 Jul 1777 |
 | Anne (Countess of Orkney) Hamilton 1694-1756 |
| Anne (Countess of Orkney) Hamilton | |
| B: | 1694 |
| M: | 29 Mar 1720 |
| D: | 6 Dec 1756 |