William (3rd Earl of Inchiquin) O'brien
- Yes, date unknown
1. William (3rd Earl of Inchiquin) O'brien (son of William (2nd Earl of Inchiquin) O'brien); and died. Family/Spouse: Lady Margaret Boyle. Margaret (daughter of Roger (1st Earl of Orrery) Boyle and Lady Margaret Howard) and died. [Group Sheet] [Family Chart]
Family/Spouse: Mary Villiers. Mary (daughter of Sir Edward Villiers and Lady Frances (of Suffolk) Howard) died on 17 Apr 1753. [Group Sheet] [Family Chart]
Children:- Lady Henrietta O'brien died on 2 May 1730; was buried on 4 May 1730 in St Michau's Church.
- William (4th Earl of Inchiquin) O'brien was born in 1694; died on 18 Jul 1777.
2. William (2nd Earl of Inchiquin) O'brien was born in 1638 (son of Murchadh (1st Earl of Inchiquin) O'brien and Elizabeth St Leger); died in 1691. Children:
- 1. William (3rd Earl of Inchiquin) O'brien and died.
Generation: 3
4. Murchadh (1st Earl of Inchiquin) O'brien was born in 1614 (son of Dermont (5th Lord Inchiquin) O'brien and Ellen (of Cloyne) Fitzgerald); died on 9 Sep 1674. Murchadh married Elizabeth St Leger about 1 Oct 1635. Elizabeth (daughter of William (Lord President of Munster) St Leger and Gertrude (of Dort) De Vries) died on 22 May 1685. [Group Sheet] [Family Chart]
5. Elizabeth St Leger (daughter of William (Lord President of Munster) St Leger and Gertrude (of Dort) De Vries); died on 22 May 1685. Children:
- Captain (Rn) Charles O'brien and died.
- John O'brien and died.
- Honora O'brien and died.
- Mary (of Inchiquin) O'brien and died.
- Elizabeth (of Inchiquin) O'brien and died.
- 2. William (2nd Earl of Inchiquin) O'brien was born in 1638; died in 1691.
Generation: 4
8. Dermont (5th Lord Inchiquin) O'brien was born in Oct 1594 (son of Murrough (4th Lord Inchiquin) O'brien and Mabel (of Delvin) Nugent); died in 1624. Dermont + Ellen (of Cloyne) Fitzgerald. Ellen (daughter of Edmund (Sir) Fitz-Edmund (of Cloyne) Fitzgerald and Honora Fitzgerald) and died. [Group Sheet] [Family Chart]
9. Ellen (of Cloyne) Fitzgerald (daughter of Edmund (Sir) Fitz-Edmund (of Cloyne) Fitzgerald and Honora Fitzgerald); and died. Children:
- Mary O'brien and died.
- 4. Murchadh (1st Earl of Inchiquin) O'brien was born in 1614; died on 9 Sep 1674.
10. William (Lord President of Munster) St Leger and died. William + Gertrude (of Dort) De Vries. Gertrude and died. [Group Sheet] [Family Chart]
11. Gertrude (of Dort) De Vries and died. Children:
- 5. Elizabeth St Leger died on 22 May 1685.