Family: Brabazon Ponsonby, 1st. Earl of Bessborough / Sarah Margetson (F3480)
m. 1704William Ponsonby, 1st. Viscount Duncannon (1659-1724) 
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Mary Moore (1662-1713)
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Dorothy Ponsonby ( -1725)  |
| Major-General Henry Ponsonby ( -1745) |
| Capt. Folliott Ponsonby (1682-1746) |
| Elizabeth Ponsonby ( -1700) |
| Anne Ponsonby ( -1710) |
| Letitia Ponsonby (1701-1723) |
| Brabazon 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) |
| Rt. Hon. John Ponsonby (1713-1789) |
| Lady Sarah Ponsonby ( -1737) |
| Lady Letitia Ponsonby (1720-1754) |