Frances Jocelyn, Viscountess Jocelyn Cowper was born in 1820, the youngest daughter of Emily Lamb, Countess Cowper, a daughter of Peniston Lamb, 1st Viscount Melbourne. Her paternity was officially attributed to Lady Cowper's husband, the 5th Earl Cowper. However, the historian K.D. Reynolds and others have argued that Henry John Temple, 3rd Viscount Palmerston was actually the father of Lady Frances and her brother William. Once widowed, her mother married Palmerston, though Lady Frances did not care for him. He became Prime Minister in 1859. In 1838, Lady Frances served as a maid of honour at the Coronation of Queen Victoria, and she also
Elizabeth Lamb, Viscountess Melbourne Besford in the Duchess' novel "The Sylph". By contrast, she and the Duchess' sister, Henrietta Ponsonby, Countess of Bessborough, disliked each other intensely, and Lady Melbourne's enmity later extended to Henrietta's daughter, Lady Caroline Lamb. True to her practical nature, she did not allow this dislike to interfere with her support for her son William's marriage to Caroline, which was a social step up for the Lamb family, who were still, by the strict social standards of the age, considered to be newcomers to polite society. By the late 1770s, Lady Melbourne was romantically involved with George Wyndham, 3rd Earl