Peter Kerr, 12th Marquess of Lothian British politician (1922-2004) (1922–2004) Parents Marie Kerr Andrew Kerr Children Lady Cecil Kerr Clare FitzRoy, Countess of Euston Ralph Kerr, 14th Marquess of Lothian Michael Ancram Elizabeth Scott, Duchess of Buccleuch Lady Mary Kerr Siblings Lord John Kerr Partners Antonella Kerr, Marchioness of Lothian