Viscounts Palmerston (1723) Henry Temple, 1st Viscount Palmerston (c. 1673-1757) Henry Temple, 2nd Viscount Palmerston (1739-1802) Henry John Temple, 3rd Viscount Palmerston (1784-1865) Reference PALMERSTON, HENRY JOHN TEMPLE, 3RD VISCOUNT, 1911 Encyclopedia Britannica