Biographical details from <<https://my.strathspey.org/dd/issue/3321/|issue 3321>>:
Katharine Marjory Stewart-Murray, Duchess of Atholl, DBE (née Ramsay; 6 November 1874 – 21 October 1960). Wife of John Stewart-Murray, 8th Duke of Atholl (he was styled Marquess of Tullibardine until 1917).