Family: Rt. Hon. John Ponsonby / Lady Elizabeth Cavendish (F3768)
m. 22 Sep 1743Brabazon Ponsonby, 1st. Earl of Bessborough (1679-1758) 
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Sarah Margetson ( -1773)
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William Ponsonby, 2nd. Earl of Bessborough (1704-1793)  |
| Lady Sarah Ponsonby ( -1737) |
| Lady Letitia Ponsonby (1720-1754) |
| William Cavendish, 3rd.Duke of Devonshire KG PC (1698-1755)
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| Katherine Hoskyns (1698-1777) |
| Caroline Cavendish (1719-1760) |
| William Cavendish, 4th. Duke of Devonshire KG PC (1720-1764) |
| Lady Elizabeth Cavendish (1723-1796)
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| Rt. Hon. John Ponsonby (1713-1789)
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| Rt. Hon. George Ponsonby (1755-1817) |