Family: William (2nd Earl of Bessborough) Ponsonby / Caroline (of Devonshire) Cavendish (F45828)
m. 5 Jul 1739
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 | Sarah Margetson ( -1733)
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 | John (Rt Hon) Ponsonby ( -1789)  |
| William (3rd Duke of Devonshire) Cavendish (1698-1755)
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| Catherine Hoskins ( -1777)
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| William (4th Duke of Devonshire) Cavendish (1720-1764) |
| William (2nd Earl of Bessborough) Ponsonby (1704-1793)
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| Caroline (of Devonshire) Cavendish (1719-1760)
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| Frederich (3rd Earl of Bessborough) Ponsonby (1758-1844) |
| Catherine (of Bessborough) Ponsonby ( -1789) |