Gwendolen Mary Fitzalan-Howard, Duchess of Norfolk, 12th Lady Herries of Terregles (née Constable-Maxwell; 11 January 1877 – 28 August 1945) was the eldest child of Marmaduke Constable-Maxwell, 11th Lord Herries of Terregles and his wife, Angela (née Fitzalan-Howard).

On 15 February 1904, she married her first cousin once removed, Henry Fitzalan-Howard, 15th Duke of Norfolk.

[1][2] The couple later had four children: Upon the death of her father in 1908, she, as the eldest child and daughter, inherited the Lordship Herries of Terregles.

A Requiem Mass was said at St Mary's in New Abbey before interment in the Norfolk burial vault at Arundel Castle in Sussex.

[3] This biography of a duke or duchess in the peerage of England is a stub.