|Robert Greville Lord Brooke van Beauchamps Court|
Wriothesley Baptiste Noel Earl van Gainsborough
John Sheffield Hertog van Buckingham
Hon. Catherine Greville was the daughter of Fulke Greville, 5th Baron Brooke of Beauchamps Court and Sarah Dashwood. She married, firstly, Sir Wriothesley Baptist Noel, 2nd Earl of Gainsborough, son of Sir Edward Noel, 1st Earl of Gainsborough and Lady Elizabeth Wriothesley, on 30 December 1687.
She married, secondly, Sir John Sheffield, 1st Duke of the County of Buckingham and of Normanby, son of Edmund Sheffield, 2nd Earl of Mulgrave and Elizabeth Cranfield, on 12 March 1698/99 at St. Clement Danes, Westminster, London, England.
She died on 7 February 1703/4.2 She was buried on 11 February 1703/4 at Westminster Abbey, Westminster, London, England.
From 30 December 1687, her married name became Noel. As a result of her marriage, Hon. Catherine Greville was styled as Countess of Mulgrave on 12 March 1698/99. From 12 March 1698/99, her married name became Sheffield. As a result of her marriage, Hon. Catherine Greville was styled as Duchess of the County of Buckingham and of Normanby on 23 March 1703.