. . "1724" . . "William Ponsonby
1st Viscount Duncannon" . . "1659" . . . . . "William Ponsonby" . . . . . . . . . . "William Ponsonby, 1st Baron Bessborough" . . . . . . . . . . . "William Ponsonby, 1st Viscount Duncannon" . "William Ponsonby, 1st Viscount Duncannon" . . . . . . . . . . . .