As of 2013 the title is held by his only son , the second Baron , who succeeded in 1968 .
Kerr was a grandson of Lord Charles Lennox Kerr , fourth son of William Kerr , 6th Marquess of Lothian .
As of 2013 the title is held by Kerr 's only son , the second Baron , who succeeded in 1968 .
Kerr was a grandson of Lord Charles Lennox Kerr , fourth son of William Kerr , 6th Marquess of Lothian .