Margaret Georgiana Poyntz was born 27 April 1737 Midgham House in Midgham, Berkshire, England, United Kingdom to Stephen Poyntz (1685-1750) and Anna Maria Mordaunt (1712-1771) and died 18 March 1814 St Albans, Hertfordshire, England, United Kingdom of unspecified causes. She married John Spencer, 1st Earl Spencer (1734-1783) 20 December 1755 in Althorp, Northamptonshire, England, United Kingdom.
|Georgiana Spencer (1757-1806)||7 June 1757 Althorp, Northamptonshire||30 March 1806 Devonshire House, Westminster, England||William Cavendish, 5th Duke of Devonshire (1748-1811) |
Charles Grey, 2nd Earl Grey (1764-1845)
|George John Spencer, 2nd Earl Spencer (1758-1834)||1 September 1758 Wimbledon Park, Surrey, England, United Kingdom||10 November 1834 Althorp, England, United Kingdom||Lavinia Bingham (1762-1831)|
|Henrietta Frances Spencer (1761-1821)||16 June 1761 Wimbledon, England, United Kingdom||11 November 1821 Florence, Italy||Frederick Ponsonby, 3rd Earl of Bessborough (1758-1844) |
Granville Leveson-Gower, 1st Earl Granville (1773-1846)
|Charlotte Spencer (1765-1766)|
|Louisa Spencer (1769-1769)|