Henry Drummond
- Yes, date unknown
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 | Louisa Elizabeth Percy 1869-Yes, date unknown |
| Louisa Elizabeth Percy | |
| B: | 7 Nov 1869 |
| D: | Yes, date unknown |
| Edith Eleanor Percy 1869-Yes, date unknown |
| Edith Eleanor Percy | |
| B: | 7 Nov 1869 |
| D: | Yes, date unknown |
| Henry Algernon George (Earl) Percy 1871-Yes, date unknown |
| Henry Algernon George (Earl) Percy | |
| B: | 21 Jan 1871 |
| D: | Yes, date unknown |
| Josceline Percy 1872-Yes, date unknown |
| Josceline Percy | |
| B: | 26 Jan 1872 |
| D: | Yes, date unknown |
| Margaret Percy 1873-Yes, date unknown |
| Margaret Percy | |
| B: | 30 Aug 1873 |
| D: | Yes, date unknown |
| Victoria Alexandrina Percy 1875-Yes, date unknown |
| Victoria Alexandrina Percy | |
| B: | 12 Feb 1875 |
| D: | Yes, date unknown |
| Ralph William Percy 1877-Yes, date unknown |
| Ralph William Percy | |
| B: | 9 Mar 1877 |
| D: | Yes, date unknown |
| Mary Percy 1878-Yes, date unknown |
| Mary Percy | |
| B: | 30 Aug 1878 |
| D: | Yes, date unknown |
| Alan Ian (8th Duke of Northumberland) Percy | |
| B: | 17 Apr 1880 |
| D: | 23 Aug 1930 |
| Helen Magdalene Gordon-Lennox | |
| D: | 13 Jun 1965 |
| William Richard Percy 1882-1963 |
| William Richard Percy | |
| B: | 17 May 1882 |
| D: | 8 Feb 1963 |
| Mary Swinton | |
| M: | 25 Jul 1922 |
| James Percy 1885-Yes, date unknown |
| James Percy | |
| B: | Jan 1885 |
| D: | Yes, date unknown |
| Eustace Sutherland Campbell Percy 1887-Yes, date unknown |
| Eustace Sutherland Campbell Percy | |
| B: | 21 Mar 1887 |
| D: | Yes, date unknown |
| Muriel Evelyn Nora Percy 1890-Yes, date unknown |
| Muriel Evelyn Nora Percy | |
| B: | 14 Jul 1890 |
| D: | Yes, date unknown |
| Henry George (7th Duke of Northumberland) Percy | |
| B: | 29 May 1846 |
| D: | 14 May 1918 |
| Edith Campbell 1849-1913 |
| Edith Campbell | |
| B: | 7 Nov 1849 |
| M: | 23 Dec 1868 |
| D: | 6 Jul 1913 |
| Algernon Malcolm Arthur Percy 1851-Yes, date unknown |
| Algernon Malcolm Arthur Percy | |
| B: | 2 Oct 1851 |
| D: | Yes, date unknown |
| Louisa Drummond -1890 |
| Louisa Drummond | |
| D: | 18 Dec 1890 |
| Algernon George (6th Duke of Northumberland) Percy | |
| B: | 2 May 1810 |
| M: | 23 Dec 1868 |
| D: | 2 Jan 1899 |
| Henry Drummond -Yes, date unknown |
| Henry Drummond | |
| D: | Yes, date unknown |