Double Duchess

Louisa Frederica Augusta Cavendish, Duchess of Devonshire, formerly Louisa Montagu, Duchess of Manchester (born Countess Luise Friederike Auguste von Alten; 15 June 1832 – 15 July 1911), was a German-born British aristocrat sometimes referred to as the "Double Duchess" due to her marriages, firstly to the 7th Duke of Manchester and then to the 8th Duke of Devonshire.