British soldier, landowner and politician (1763–1824)
William Kerr, 6th Marquess of Lothian, KT, FRSE (4 October 1763 – 27 April 1824), was a British soldier, landowner and politician. He was the son of William Kerr, 5th Marquess of Lothian. He served as a representative peer from 1817 to 1824.