Viscounts Portman (1873) Edward Berkeley Portman, 1st Viscount Portman (1799-1888) Henry Berkeley Portman, 2nd Viscount Portman (1829-1919) Henry Berkeley Portman, 3rd Viscount Portman (1860-1923) Claud Berkeley Portman, 4th Viscount Portman (1864-1929) Edward Claud Berkeley Portman, 5th Viscount Portman (1898-1942) Seymour Berkeley Portman, 6th Viscount Portman (1868-1946) Gerald Berkeley Portman, 7th Viscount Portman (1875-1948) Gerald William Berkeley Portman, 8th Viscount Portman (1903-1967) Edward Henry Berkeley Portman, 9th Viscount Portman (1934-1999) Christopher Edward Berkeley Portman, 10th Viscount Portman (b. 1958)
