General Lord William Frederick Ernest Seymour, KCVO (8 December 1838 – 9 February 1915), known as William Seymour until 1871, was a senior British Army officer.

Born the son of Admiral Sir George Francis Seymour, Seymour served in the Crimean War in 1854 and in the Anglo-Egyptian War in 1882.

[1] He became General Officer Commanding South-Eastern District in February 1891,[2] and Commander of the British Troops in Canada in 1898.

[3] From November 1901 to 1902, he served as acting military secretary in the absence of Ian Hamilton.

He became lieutenant of the Tower of London on 1 September 1902,[4] was promoted to full general on 25 October 1902,[5] and retired in December 1905.