| Birth |
16 Jun 1761 |
Wimbledon, London Borough of Merton, Greater London, England |
| Died |
14 Nov 1821 |
Florence, Italy |
| |
| Father |
Baron Spencer of Althop John (1st Earl Spencer) Spencer, b. 1734, Althorpe, Northamptonshire, England |
| Relationship |
natural |
| Mother |
Margaret Georgiana Poyntz, b. 1737, Midgham, Berkshire, England |
| Relationship |
natural |
| Married |
20 Dec 1755 |
Northamptonshire, England |
| |
| Family 1 |
Fredrick (3rd Earl Bessbrough) Ponsonby, b. 1758, St Mary le Bone, Berkeley Square, London, England |
| Married |
27 November 1780 |
St James', Westminster, London, England |
| Children |
| + | 1. Sir John William(4th Earl of Bessborough) Ponsonby, b. 31 Aug 1781, London, England |
| + | 2. Caroline Ponsonby, b. 13 Nov 1785, England |
| | 3. William Francis Spencer Ponsonby, 1st Baron de Mauley of Canford, b. 31 Jul 1787, Cavendish Square, St Marylebone, Middlesex, England |
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| |
| Children |
| + | 1. Maj.-Gen Frederick Cavendish Ponsonby (maid. name KCH KCB GCMG), b. 6 Jul 1783, Marylebone, Middlesex, England |
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