- Born: 24 October 1783, Venice, Italy
- Marriage: George Augustus Herbert, 11th Earl of Pembroke on 25 January 1808 in Marylebone, London
- Died: 27 March 1856, 1 Grafton Street, Mayfair, London aged 72
 General Notes:
Ekaterina Semenovna Vorontsova. Also found as born in St. Petersburg. Listed as born in Venice in 1851 census.
Noted events in her life were:
1. Census UK 1851: 30 March 1851, 1 Grafton Street, Mayfair, London.
Catherine married George Augustus Herbert, 11th Earl of Pembroke, son of Henry Herbert, 10th Earl of Pembroke and Lady Elizabeth Spencer, on 25 January 1808 in Marylebone, London. (George Augustus Herbert, 11th Earl of Pembroke was born on 11 September 1759 in Wilton House, The Park, Wilton, Wiltshire 107, christened on 29 October 1759 in Wilton House, The Park, Wilton, Wiltshire, died on 26 October 1827 in Pembroke House, Privy Gardens, Whitehall and was buried on 12 November 1827 in Wilton, Wiltshire.)
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