The son of Gen. Thomas Twisleton, seventh Baron Saye and Sele (d. 1788); he served in the Coldstream Guards.

REFERENCES TO Gregory William Eardley-Twisleton-Fiennes, eighth baron Saye and Sele:

Thomas Creevey to Elizabeth Ord, 5 March 1827 in The Creevey Papers: A Selection from the Correspondence & Diaries of the late Thomas Creevey, M.P. (London: John Murray, 1903)