William (2nd Earl of Inchiquin) O'brien
1638 - 1691 (53 years)(
= Descendancy chart to this point, 
= Expand, 
= Collapse)
- 1 William (2nd Earl of Inchiquin) O'brien [1] b. 1638 d. 1691
-
- 2 William (3rd Earl of Inchiquin) O'brien [1.1] d. Yes, date unknown
- + Lady Margaret Boyle d. Yes, date unknown
- Mary Villiers d. 17 Apr 1753
- 3 Lady Henrietta O'brien [1.1.1] d. 2 May 1730
- Robert Sandford d. Yes, date unknown
- 4 Henrietta Sandford [1.1.1.1] d. Yes, date unknown
[ =>]
- 4 William Sandford [1.1.1.2] bur. 29 Jan 1718
- 4 Henry (Lord Kilworth) Sandford [1.1.1.3] d. Yes, date unknown
- 4 Lt Robert Sandford [1.1.1.4] d. Yes, date unknown
- 4 Other Daughters Sandford [1.1.1.5] d. Yes, date unknown
- 4 Henrietta Sandford [1.1.1.1]
- 3 William (4th Earl of Inchiquin) O'brien [1.1.2] b. 1694 d. 18 Jul 1777
- Anne (Countess of Orkney) Hamilton b. 1694 d. 6 Dec 1756
- 4 Mary (Countess of Orkney) O'brien [1.1.2.1] b. 12 Jan 1733 d. Yes, date unknown
- 4 William Lord O'brien [1.1.2.2] b. 1725 d. Yes, date unknown
- 4 George Lord O'brien [1.1.2.3] b. 8 Aug 1727 d. Yes, date unknown
- 4 Augustus O'brien [1.1.2.4]
- 4 Murrough (4th Viscount Kirkwall) O'brien [1.1.2.5] b. Nov 1731 d. 20 Sep 1741
- 4 Mary (Countess of Orkney) O'brien [1.1.2.1]
- 3 Lady Henrietta O'brien [1.1.1]
- + Lady Margaret Boyle d. Yes, date unknown
- 2 William (3rd Earl of Inchiquin) O'brien [1.1]
- + Elizabeth (of Chandos) Brydges b. Bef 25 Mar 1651 d. 3 Feb 1718
- Margaret (of Orrery) Boyle d. 1683
- 2 William (3rd Earl of Inchiquin) O'brien [1.2] b. Abt 1666 d. 24 Dec 1719
- Mary Villiers d. 17 Apr 1753
- 3 Mary (of Inchiquin) O'brian [1.2.1] b. 12 Feb 1692 d. 10 Feb 1780
- Robert (19Th Earl of Kildare) Fitzgerald b. 1675 d. 20 Nov 1744
- 4 Margaret (Countess Hillsborough) Fitzgerald [1.2.1.1] d. 19 Jan 1766
[ =>]
- 4 James (1st Duke of Leinster) Fitzgerald [1.2.1.2] b. 29 May 1722 d. 19 Nov 1773
[ =>]
- 4 Margaret (Countess Hillsborough) Fitzgerald [1.2.1.1]
- 3 William (4th Earl of Inchiquin) O'brien [1.2.2] b. 1694 d. 18 Jul 1777
- Anne (Countess of Orkney) Hamilton b. 1694 d. 6 Dec 1756
- 4 Mary (Countess of Orkney) O'brien [1.2.2.1] b. 12 Jan 1733 d. Yes, date unknown
- 4 William Lord O'brien [1.2.2.2] b. 1725 d. Yes, date unknown
- 4 George Lord O'brien [1.2.2.3] b. 8 Aug 1727 d. Yes, date unknown
- 4 Augustus O'brien [1.2.2.4]
- 4 Murrough (4th Viscount Kirkwall) O'brien [1.2.2.5] b. Nov 1731 d. 20 Sep 1741
- 4 Mary (Countess of Orkney) O'brien [1.2.2.1]
- 3 Mary (of Inchiquin) O'brian [1.2.1]
- 2 Henry O'brien [1.3] d. Yes, date unknown
- 2 James O'brien [1.4] d. Yes, date unknown
- 2 Margaret O'brien [1.5] d. Yes, date unknown
- 2 William (3rd Earl of Inchiquin) O'brien [1.2]