Lady Mary Fortescue (15 September 1792, Filleigh, Devon – 12 August 1874, London). Married 15 February 1823 to Sir James Hamlyn Williams of Edwinsford, Carms., and Clovelly, Devon. Buried at Talley, Carms., in the family vault at her special request).
Lady Catherine Fortescue (1787 – 20 May 1854), said to have been deaf and dumb. She married in 1820 (as his second wife) her lifelong friend Hon. Newton Fellowes (1772 – January 1854), of Eggesford House, Devon, who became in the last year of his life 4th Earl of Portsmouth.[4] They had issue, 1 son (the 5th Earl of Portsmouth b. 1825, from whom all later earls are descended) and three daughters. Her husband's two sons by his first wife both died young and/or unmarried before their father inherited the title.
Lady Anne Fortescue (died 1864), married George Wilbraham and had issue.
Lady Eleanor Fortescue (1798–1847), chest tomb in Weare Giffard Church, Devon.