. . "Argyll, John Douglas Edward Henry Campbell, Duke of" . "John"@en . . . "1777-12-21" . "Duke of" . "Duke of John Douglas Edward Henry Campbell Argyll"@en . "7th Duke of Argyll John Douglas Edward Henry Campbell" . "Argyll"@en . "Douglas Edward Henry Campbell"@en . . "Campbell" . "1847-04-25" . "Douglas Edward Henry" . "John Douglas Edward Henry Campbell" . "Campbell, John Douglas Edward Henry, 7th Duke of Argyll" .