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
Sir Matthew Lamb, 1st Baronet November 1768 and was succeeded in the baronetcy by his son Peniston, who was raised to the peerage as Viscount Melbourne in 1770. His daughter Charlotte married Henry Belasyse, 2nd Earl Fauconberg. Sir Matthew Lamb, 1st Baronet Sir Matthew Lamb, 1st Baronet (1705 – 6 November 1768) was a British barrister and politician. He was the grandfather of Prime Minister William Lamb, 2nd Viscount Melbourne. Lamb was the son of Matthew Lamb, of Southwell, Nottinghamshire, and nephew of Peniston Lamb. His brother was Robert Lamb, bishop of Peterborough. He sat as Member of Parliament for Stockbridge between 1741 and 1747