Family: Charles William Fitzwilliam, 5th. Earl Fitzwilliam / Mary Dundas (F2392)
m. 8 Jul 1806William Fitzwilliam, 4th. Earl Fitzwilliam (1748-1833) 
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Lady Charlotte Ponsonby (1750-1822)
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| Mary Dundas (1786-1830) |
Hon. George William Wentworth-Fitzwilliam, M.P. (1817-1874)  |