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
William Ponsonby, 1st Baron de Mauley December 1832. At the 1832 UK general election he was elected MP for Dorset and held the seat until 1837. In 1838 he was created Baron de Mauley. Whilst an MP for Poole, Ponsonby and Benjamin Lester opened Poole's first public library in 1830. When the marriage of his sister Lady Caroline Lamb to William Lamb, 2nd Viscount Melbourne, began to break up, he strongly supported Caroline. Unfortunately he was not noted for tact or intelligence—Melbourne's sister Emily Lamb, Countess Cowper, described him as being universally regarded as "an ass and a jackanapes". Ponsonby reminded Melbourne that the Lamb family