Louisa Fox-Strangways British marchioness (1785–1851) Parents Mary Theresa Fox-Strangways, Countess of Ilchester Henry Fox-Strangways, 2nd Earl of Ilchester Children Henry Petty-Fitzmaurice, 4th Marquess of Lansdowne Lady Louisa Petty-FitzMaurice Bentinck Yelverton Petty-FitzMaurice William Petty-FitzMaurice, Earl of Kerry Siblings Lady Harriot Fox-Strangways Mary Cole Lady Charlotte Anne Fox-Strangways Elizabeth Theresa Fox- Strangways Henry Fox-Strangways, 3rd Earl of Ilchester William Fox-Strangways, 4th Earl of Ilchester John Fox-Strangways Giles Digby Robert Fox-Strangways Partners Henry Petty-Fitzmaurice, 3rd Marquess of Lansdowne