Gwendolen Fitzalan-Howard, 12th Lady Herries of Terregles

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