Prior to Now family trees centre
O'Brien, Hon James
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- 1 O'Brien, Hon James [1] b. 1695 d. 17 Dec 1771
Jephson, Mary b. Abt 1700 d. 6 Mar 1760
- 2 O'Brien, Murrough 1st Marquess of Thomond [1.1]
b. Abt 1726 d. 10 Feb 1808
O'Brien, Mary 3rd Countess of Orkney (suo jure) Marchioness of Thomond b. Abt 1721 d. 10 May 1791
- 3 O'Brien, Mary [1.1.1]
b. 4 Sep 1755 d. 30 Dec 1831
FitzMaurice, Hon Thomas b. Abt 1742 d. 28 Oct 1793
- 4 FitzMaurice, John Hamilton Viscount Kirkwall [1.1.1.1]
b. 9 Oct 1778 d. 23 Nov 1820
- 4 FitzMaurice, John Hamilton Viscount Kirkwall [1.1.1.1]
- 3 O'Brien, Mary [1.1.1]
- + Palmer, Mary Marchioness of Thomond b. Abt 1750 d. Abt 1820
- 2 O'Brien, Edward [1.2]
b. 1736 d. Mar 1801
Carrick, Mary b. Abt 1749 d. Mar 1801
- 3 O'Brien, Capt Lord Edward [1.2.1]
b. Abt 1780 d. 9 Mar 1824
- + Hotham, Diana b. Abt 1777 d. 26 Nov 1810
- + Somerset, Lady Elizabeth Susan b. 23 Jun 1798 d. 16 Apr 1876
- + Hotham, Diana b. Abt 1777 d. 26 Nov 1810
- 3 O'Brien, Capt Lord Edward [1.2.1]
- 2 O'Brien, Murrough 1st Marquess of Thomond [1.1]