Sir Marriott Fawckner Nicholls CBE, FRCS, (12 May 1898 – 25 August 1969) was an English surgeon who specialised in the genitourinary tract.

He served in the British Army in both the First and Second World Wars and was dean of the medical school at St George's Hospital for 20 years.

[3] He became a fellow of the Royal College of Surgeons of England (FRCS) in 1926, and graduated with a bachelor of surgery degree in 1928.

[1][2] He joined the consultant staff at St George's in 1932 and began a successful career in surgery with a specialism in genito-urinary work.

One of his major difficulties stemmed from the move of St George's Hospital from Hyde Park Corner to Tooting, and he was successful in being the first to effectively transfer his department to this new site.

[1] He also stood for the 1952 Royal College of Surgeons Council elections, however, Price Thomas received most votes.