Mary Montagu Douglas Scott, Duchess of Buccleuch and Queensberry

(Vreda Esther) Mary Montagu Douglas Scott, Duchess of Buccleuch and Queensberry (17 September 1900 – 9 February 1993), (née (Vreda Esther) Mary Lascelles) , was the elder of the two daughters of Major William Frank Lascelles and Lady Sybil Evelyn de Vere Beauclerk.

On 21 April 1921 she married Walter Montagu Douglas Scott, 8th Duke of Buccleuch and 10th Duke of Queensberry; her title was officially styled "Duchess of Buccleuch" on 19 October 1935. They had three children:

The Duchess died aged 92 at Boughton House on 9 February 1993. She was buried next to her husband among the ruins of Melrose Abbey.

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