
- 1705
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- 1 Elizabeth (of Suffolk) Howard [1] d. 11 Mar 1705
Algernon (10th Earl of Northumberland) Percy b. 13 Oct 1602 d. 13 Oct 1668
- 2 Joceline (11th Earl of Northumberland) Percy [1.1]
b. 4 Jul 1644 d. 21 May 1670
Elizabeth (of Southampton) Wriothesley d. Sep 1690
- 3 Elizabeth (of Northumberland) Percy [1.1.1]
b. 26 Jan 1667 d. Yes, date unknown
- + Henry (Earl of Ogle) Cavendish d. 1 Nov 1680
- + Thomas (of Longleat) Thynne b. 1648 d. 12 Feb 1682
Charles (6th Duke of Somerset) Seymour b. 13 Aug 1662 d. 2 Dec 1748
- 4 Algernon (7th Duke of Somerset) Seymour [1.1.1.1]
b. 11 Nov 1684 d. 7 Feb 1750
Frances Thynne b. 1699 d. 7 Jul 1754
- 5 Elizabeth (Baroness Percy) Seymour [1.1.1.1.1]
d. Yes, date unknown
Hugh Smithson (1st Duke of Northumberland) Percy b. 1714 d. 6 Jun 1786
- 6 Hugh (2nd Duke of Northumberland) Percy [1.1.1.1.1.1]
b. 14 Aug 1742 d. 10 Jul 1817
- 6 Algernon (1st Earl of Berverley) Percy [1.1.1.1.1.2]
b. 21 Jan 1750 d. 21 Oct 1830
Isabell Susannah Burrell d. Yes, date unknown
- 7 George (5th Duke of Northumberland) Percy [1.1.1.1.1.2.1]
b. 22 Jun 1778 d. 22 Aug 1867
Louisa Harcourt Wortley d. Yes, date unknown
- 8 Algernon George (6th Duke of Northumberland) Percy [1.1.1.1.1.2.1.1]
b. 2 May 1810 d. 2 Jan 1899
Louisa Drummond d. 18 Dec 1890
- 9 Henry George (7th Duke of Northumberland) Percy [1.1.1.1.1.2.1.1.1]
b. 29 May 1846 d. 14 May 1918
Edith Campbell b. 7 Nov 1849 d. 6 Jul 1913
- 10 Louisa Elizabeth Percy [1.1.1.1.1.2.1.1.1.1]
b. 7 Nov 1869 d. Yes, date unknown
- 10 Edith Eleanor Percy [1.1.1.1.1.2.1.1.1.2]
b. 7 Nov 1869 d. Yes, date unknown
- 10 Henry Algernon George (Earl) Percy [1.1.1.1.1.2.1.1.1.3]
b. 21 Jan 1871 d. Yes, date unknown
- 10 Josceline Percy [1.1.1.1.1.2.1.1.1.4]
b. 26 Jan 1872 d. Yes, date unknown
- 10 Margaret Percy [1.1.1.1.1.2.1.1.1.5]
b. 30 Aug 1873 d. Yes, date unknown
- 10 Victoria Alexandrina Percy [1.1.1.1.1.2.1.1.1.6]
b. 12 Feb 1875 d. Yes, date unknown
- 10 Ralph William Percy [1.1.1.1.1.2.1.1.1.7]
b. 9 Mar 1877 d. Yes, date unknown
- 10 Mary Percy [1.1.1.1.1.2.1.1.1.8]
b. 30 Aug 1878 d. Yes, date unknown
- 10 Alan Ian (8th Duke of Northumberland) Percy [1.1.1.1.1.2.1.1.1.9]
b. 17 Apr 1880 d. 23 Aug 1930
- 10 William Richard Percy [1.1.1.1.1.2.1.1.1.10]
b. 17 May 1882 d. 8 Feb 1963
- 10 James Percy [1.1.1.1.1.2.1.1.1.11]
b. Jan 1885 d. Yes, date unknown
- 10 Eustace Sutherland Campbell Percy [1.1.1.1.1.2.1.1.1.12]
b. 21 Mar 1887 d. Yes, date unknown
- 10 Muriel Evelyn Nora Percy [1.1.1.1.1.2.1.1.1.13]
b. 14 Jul 1890 d. Yes, date unknown
- 9 Algernon Malcolm Arthur Percy [1.1.1.1.1.2.1.1.2]
b. 2 Oct 1851 d. Yes, date unknown
- 7 Hugh (Bishop) Percy [1.1.1.1.1.2.2]
b. 29 Jan 1784 d. Yes, date unknown
- 7 Josceline Percy [1.1.1.1.1.2.3]
b. 29 Jan 1784 d. Yes, date unknown
- 7 Henry Percy [1.1.1.1.1.2.4]
b. 14 Sep 1785 d. Yes, date unknown
- 7 Charles Gratheed Bertie Percy [1.1.1.1.1.2.5]
b. 4 Mar 1794 d. Yes, date unknown
- 7 Charlotte Percy [1.1.1.1.1.2.6]
d. Yes, date unknown
- 7 Emily Charlotte Percy [1.1.1.1.1.2.7]
d. Yes, date unknown
- 5 George (Viscount Beauchamp) Seymour [1.1.1.1.2]
b. 11 Sep 1725 d. 11 Sep 1744
- 4 Elizabeth (of Somerset) Seymour [1.1.1.2]
b. 1685 d. 2 Apr 1734
- 4 Katherine (of Somerset) Seymour [1.1.1.3]
d. 1731
- 4 Anne (of Somerset) Seymour [1.1.1.4]
d. 1722