Of Brockett Hall; he married Elizabeth Milbanke in 1769 and was father of the prime minister William Lamb (1779-1848).

CORRESPONDENCE OF Peniston Lamb, first viscount Melbourne:

William Lamb to Lord Melbourne, 26 February 1812 in In Whig Society 1775-1818: Compiled from the hitherto unpublished Correspondence of Elizabeth, Viscountess Melbourne, and Emily Lamb, Countess Cowper, afterwards Viscountess Palmerston (London: Hodder and Stoughton LTD., 1921)

Lord Melbourne to Lady Melbourne [1818?] in In Whig Society 1775-1818: Compiled from the hitherto unpublished Correspondence of Elizabeth, Viscountess Melbourne, and Emily Lamb, Countess Cowper, afterwards Viscountess Palmerston (London: Hodder and Stoughton LTD., 1921)