William Francis Cowper-Temple, 1st Baron Mount Temple, PC, known as William Cowper before 1869 and as William Cowper-Temple between 1869 and 1880, was a British Liberal statesman.

Emily Temple, Viscountess Palmerston, styled The Honourable Emily Lamb from 1787 to 1805 and Countess Cowper from 1805 to 1839, was a leading figure of the Almack's social set, sister of Prime Minister Lord Melbourne, wife of the 5th Earl Cowper, and subsequently wife of another Prime Minister Lord Palmerston.