On 22 July 1852, the twenty-year-old Louisa was married in Hanover to Viscount Mandeville, eldest son and heir of the 6th Duke of Manchester. Upon his father's death on 8 August 1855, he succeeded his father as 7th Duke of Manchester, and Louisa became Duchess of Manchester. They had five children: George Victor Drogo Montagu, 8th Duke of Manchester (1853–1892), who married Consuelo Yznaga (1853–1909), and had issue. Lady Mary Louisa Elizabeth Montagu (1854–1934), who was born at Kimbolton Castle and married, firstly, to William Douglas-Hamilton, 12th Duke of Hamilton, at Kimbolton Castle on 10 December 1873, and had issue. She secondly married on 20 July 1897 to Robert Carnaby Forster of Easton Park, Wickham Market, Suffolk (d. 1925), without issue. Lady Louisa Augusta Beatrice Montagu (1856–1944), born at Kimbolton Castle. She married Archibald Acheson, 4th Earl of Gosford, on 10 August 1876 in London, and had issue. Lord Charles William Augustus Montagu (1860–1939), who married the Hon. Mildred Cecilia Harriet Sturt (1869–1942), daughter of Henry Sturt, 1st Baron Alington, at Kimbolton Castle on 4 December 1930. He had no issue. Lady Alice Maude Olivia Montagu (1862–1957), born in London. She married Edward Stanley, 17th Earl of Derby, on 5 January 1889 in London, and had issue. Louisa became estranged from the Duke, and they lived apart for many years. Louisa became the companion of Spencer Cavendish, Marquess of Hartington, and a notable political hostess. The Duke died in Naples on 22 March 1890. On 16 August 1892, at Christ Church, Mayfair, the sixty-year-old Dowager Duchess of Manchester married Lord Hartington, by then the 8th Duke of Devonshire. She thereby became Duchess of Devonshire, with a nickname of the "Double Duchess". After the Duke of Devonshire's death on 24 March 1908, she was widowed for the second time, becoming the Dowager Duchess of Devonshire. On 15 July 1911, at the Sandown Races in Esher Park, the Duchess died after a seizure, aged 79; she was interred at Edensor in Derbyshire. Gallery References Notes Sources External links The Cavendish Story: The Double Duchess 1832 births 1911 deaths German countesses Louisa Cavendish, Duchess of Devonshire Louisa Cavendish, Duchess of Devonshire English duchesses by marriage Mistresses of the Robes to Queen Victoria Nobility from Hanover Wives of knights