Major George Frederick Myddleton Cornwallis-West (14 November 1874 – 1 April 1951) was a British Army officer, historian and writer.

[7][8] By 16 February 1917, Cornwallis-West was serving as an assistant provost marshal and he was listed as part of the Reserve of Officers; he was still in that position on 23 October.

[11] Continuing in the Reserve of Officers after the end of the First World War, Cornwallis-West left his position as a provost marshal, and reverted to his substantial rank of captain, on 13 November 1919.

In 1951, aged 76, after having been afflicted for many years with Parkinson's disease, Cornwallis-West committed suicide in his apartment at 9 North Audley Street, Westminster, leaving an estate valued for probate at £12,255.

Cornwallis-West was portrayed by Christopher Cazenove in the 1974 Thames TV mini-series Jennie: Lady Randolph Churchill.