William (3rd Earl of Inchiquin) O'brien
Abt 1666 - 1719 (~ 53 years)
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| Charlotte (of Downshire) Hill | |
| D: | 17 Jan 1804 |
| John (1st Earl Talbot) Talbot 1749-1793 |
| John (1st Earl Talbot) Talbot | |
| B: | 1749 |
| D: | 19 May 1793 |
 | Mary Amelia (of Downshire) Hill 1750-1835 |
| Mary Amelia (of Downshire) Hill | |
| B: | 16 Aug 1750 |
| Dublin | |
| D: | 27 Nov 1835 |
| James (1st Marquess of Salisbury) Cecil 1748-1823 |
| James (1st Marquess of Salisbury) Cecil | |
| B: | 4 Sep 1748 |
| M: | 2 Dec 1773 |
| D: | 13 Jun 1823 |
| Arthur (2nd Marquess of Downshire) Hill 1753-1801 |
| Arthur (2nd Marquess of Downshire) Hill | |
| B: | 3 Mar 1753 |
| D: | 7 Sep 1801 |
| Sarah Dore -1808 |
| Sarah Dore | |
| D: | 6 Jul 1808 |
| Mary (Baroness) Sandys -1836 |
| Mary (Baroness) Sandys | |
| M: | 29 Jun 1786 |
| D: | 1 Aug 1836 |
| Margaret (Countess Hillsborough) Fitzgerald | |
| D: | 19 Jan 1766 |
| William (1st Marquess of Downshire) Hill 1718-1793 |
| William (1st Marquess of Downshire) Hill | |
| B: | 30 May 1718 |
| D: | 7 Oct 1793 |
| William Robert (2nd Duke of Leinster) Fitzgerald | |
| B: | 12 Mar 1749 |
| D: | 20 Oct 1804 |
| Emila Oliva Usher St George | |
| D: | 23 Jun 1798 |
| George (Earl of Offal) Fitzgerald 1748-Yes, date unknown |
| George (Earl of Offal) Fitzgerald | |
| B: | 15 Jan 1748 |
| D: | Yes, date unknown |
| Charles James Brown(1st Baron Lecale) Fitzgerald 1756-Yes, date unknown |
| Charles James Brown(1st Baron Lecale) Fitzgerald | |
| B: | 30 Jun 1756 |
| D: | Yes, date unknown |
| Robert Stephen Fitzgerald 1765-Yes, date unknown |
| Robert Stephen Fitzgerald | |
| B: | 1765 |
| D: | Yes, date unknown |
| Charlotte Mary G. (Baroness Rayliegh) Fitzgerald -Yes, date unknown |
| Charlotte Mary G. (Baroness Rayliegh) Fitzgerald | |
| D: | Yes, date unknown |
| Lord Henry FitzGerald 1761-1829 |
| Lord Henry FitzGerald | |
| B: | 30 Jul 1761 |
| D: | 9 Jul 1829 |
| Boyle Farm, Thames Ditton, Surrey, England | |
| Charlotte (Baroness de Ros of Helmsley) Boyle | |
| B: | 24 May 1769 |
| M: | 3 Aug 1791 |
| D: | 9 Jan 1831 |
| Lord Edward Fitzgerald 1763-1798 |
| Lord Edward Fitzgerald | |
| B: | 15 Oct 1763 |
| D: | 4 Jun 1798 |
| Dublin Prison, Ireland | |
| Stephanie Caroline Anne Syms | |
| M: | 27 Dec 1792 |
| Tournai, France | |
| James (1st Duke of Leinster) Fitzgerald 1722-1773 |
| James (1st Duke of Leinster) Fitzgerald | |
| B: | 29 May 1722 |
| D: | 19 Nov 1773 |
| Emilia Mary Lennox 1731-1814 |
| Emilia Mary Lennox | |
| B: | 6 Oct 1731 |
| M: | 7 Feb 1747 |
| D: | 27 Mar 1814 |
| Mary (of Inchiquin) O'brian 1692-1780 |
| Mary (of Inchiquin) O'brian | |
| B: | 12 Feb 1692 |
| D: | 10 Feb 1780 |
| Robert (19Th Earl of Kildare) Fitzgerald 1675-1744 |
| Robert (19Th Earl of Kildare) Fitzgerald | |
| B: | 1675 |
| M: | 7 Mar 1709 |
| D: | 20 Nov 1744 |
| 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 |
| 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 |
|
| William (3rd Earl of Inchiquin) O'brien Abt 1666-1719 |
| William (3rd Earl of Inchiquin) O'brien | |
| B: | Abt 1666 |
| D: | 24 Dec 1719 |
| Mary Villiers -1753 |
| Mary Villiers | |
| M: | Apr 1691 |
| D: | 17 Apr 1753 |