Catherine Beauclerk, Duchess of St Albans British duchess, wife of the 5th Duke of St Albans (1742–1789) Parents Lady Caroline Cavendish William Ponsonby, 2nd Earl of Bessborough Children Lady Georgiana Beauclerk Amelius Beauclerk Lady Catherine Beauclerk William Beauclerk, 8th Duke of St Albans Aubrey Beauclerk, 6th Duke of St Albans Lord Frederick Beauclerk Lady Caroline Beauclerk Siblings Frederick Ponsonby, 3rd Earl of Bessborough Lady Charlotte Ponsonby Partners Aubrey Beauclerk, 5th Duke of St Albans
