Isabella Susannah Burrell Baroness Lovaine (1786) and Countess Beverley (1790) 1750–1812 Algernon Percy 1st Earl of Beverley (1790), 2nd Baron Lovaine (1784), Baron of Alnwick, M.P. 1749–1830 | | | | Peter Burrell MP, MA, FRS 1724–1775 | | | | Peter Burrell MP 1692–1756 | | | | Isabella Merrik 1661–1724 | | | | | Isabella Burdett 1628–1696 | | |
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| | | Hugh Smithson (later Percy) 1715–1786 Elizabeth Seymour Duchess of Northumberland and 2nd Baroness Percy 1716–1776 | | | | Algernon Seymour 1684–1750 |
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