1. | Margaret (of Orrery) Boyle died in 1683. Margaret married William (2nd Earl of Inchiquin) O'brien in 1665. William (son of Murchadh (1st Earl of Inchiquin) O'brien and Elizabeth St Leger) was born in 1638; died in 1691. [Group Sheet] [Family Chart]
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2. | William (3rd Earl of Inchiquin) O'brien ![]() William married Mary Villiers in Apr 1691. Mary (daughter of Sir Edward Villiers and Lady Frances (of Suffolk) Howard) died on 17 Apr 1753. [Group Sheet] [Family Chart]
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3. | Henry O'brien ![]() |
4. | James O'brien ![]() |
5. | Margaret O'brien ![]() |
6. | Mary (of Inchiquin) O'brian ![]() Mary married Robert (19Th Earl of Kildare) Fitzgerald on 7 Mar 1709. Robert (son of Robert (Ll.D) Fitzgerald and Mary Clotworthy) was born in 1675; died on 20 Nov 1744. [Group Sheet] [Family Chart]
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7. | William (4th Earl of Inchiquin) O'brien ![]() William married Anne (Countess of Orkney) Hamilton on 29 Mar 1720. Anne (daughter of George (1st Earl of Orkney) Hamilton and Elizabeth Villiers) was born in 1694; died on 6 Dec 1756. [Group Sheet] [Family Chart]
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8. | Margaret (Countess Hillsborough) Fitzgerald ![]() Family/Spouse: William (1st Marquess of Downshire) Hill. William (son of Trevor (1st Viscount Hillsborough) Hill and Mary Rowe) was born on 30 May 1718; died on 7 Oct 1793. [Group Sheet] [Family Chart]
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9. | James (1st Duke of Leinster) Fitzgerald ![]() James married Emilia Mary Lennox on 7 Feb 1747. Emilia (daughter of Charles (2nd Duke of Richmond & Lennox) Lennox and Sarah Codagan) was born on 6 Oct 1731; died on 27 Mar 1814. [Group Sheet] [Family Chart]
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10. | Mary (Countess of Orkney) O'brien ![]() |
11. | William Lord O'brien ![]() |
12. | George Lord O'brien ![]() |
13. | Augustus O'brien ![]() |
14. | Murrough (4th Viscount Kirkwall) O'brien ![]() |