Frederick William Treves BEM (29 March 1925 – 30 January 2012) was an English actor with an extensive repertoire, specialising in avuncular, military and titled types.

Treves had over a hundred television credits, including roles in A For Andromeda, The Cazalets, The Jewel in the Crown, A Dance to the Music of Time, The Politician's Wife, To Play the King, Lipstick on Your Collar, Summer's Lease, Bomber Harris, Trevor Griffiths' version of The Cherry Orchard, David Edgar's Destiny, The Naked Civil Servant, Mr. Bean, and The Railway Children.

Treves also guested in many continuing dramas, such as All Creatures Great and Small, Rosemary & Thyme, Monarch of the Glen, The Bill, The New Adventures of Black Beauty, Silent Witness, Kavanagh QC, Jeeves and Wooster, Inspector Morse, Agatha Christie's Poirot, Lovejoy, Rumpole of the Bailey , Yes, Prime Minister, Bergerac, Midsomer Murders, Heartbeat, Follyfoot, Crown Court, Miss Marple, Minder, Z-Cars, The Avengers, Doomwatch and in the Doctor Who story Meglos.

Treves' films included Freelance (1971), One Hour to Zero (1976), Sweeney 2 (1978), Charlie Muffin (1979), The Elephant Man (1980), Nighthawks (1981), Defence of the Realm (1985), Paper Mask (1990), The Fool (1990), Afraid of the Dark (1991), Mad Dogs and Englishmen (1995) and Sunshine (1999).

In the David Lynch film The Elephant Man, the surgeon is played by Anthony Hopkins and Treves himself appeared in the character of Alderman.