Mary Montagu Douglas Scott, Duchess of Buccleuch
 ( Vreda Esther ) Mary Montagu Douglas Scott , Duchess of Buccleuch and Queensberry ( 17 September 1900 – 9 February 1993 ) , was the elder of the two daughters of Major William Frank Lascelles and Lady Sybil Evelyn de Vere Beauclerk , daughter of William Beauclerk , 10th Duke of St Albans . 
<triplet> Mary Montagu Douglas Scott, Duchess of Buccleuch <subj> 17 September 1900 <obj> date of birth <subj> 9 February 1993 <obj> date of death