Isabella Elizabeth Byng (1773-1830) (1773–1830) Parents Lady Lucy Boyle George Byng, 4th Viscount Torrington Children Henry Thynne, 3rd Marquess of Bath Elizabeth Campbell, Countess Cawdor Thomas Thynne Charles Thynne Lord John Thynne Charlotte Montagu Douglas Scott, Duchess of Buccleuch Louisa Thynne Lord Edward Thynne Siblings Georgiana Byng Lucy Elizabeth Byng Emily Byng Partners Thomas Thynne, 2nd Marquess of Bath