. "12th Duke" . . . . . . "Sir D'Arcy Osborne" . . . "Francis d'Arcy Godolphin Osborne" . "Francis D'Arcy Godolphin Osborne,
'''12th Duke of Leeds'''" . "1884-09-16" . "Sir Perceval d'Arcy Osborne 12th Duke of Leeds, KCMG" . "1964" . . "1884" . . . . . . . . "12th (and last) Duke of Leeds" . "his successor" . . . . . . . "12th and last Duke of Leeds" . "Francis D'Arcy Godolphin Osborne, 12th Duke of Leeds" . "Francis D'Arcy Godolphin Osborne" . . . "1964-03-20" . "D'Arcy Osborne, 12th Duke of Leeds" . "D'Arcy Osborne" . "British envoy D'Arcy Osborne" . . . . "Francis D'Arcy Godolphin Osborne" . . "D'Arcy Osborne, 12th Duke of Leeds" . . . .