Doctor Mudd, Treated John Wilkes Booth's broken leg; Dr. Samuel Alexander Mudd (Charles County, Maryland 20 December 1833 - 10 January 1883). "His name was Mudd"

Muggs, Rapper; Lawrence Muggerud (Los Angeles January 28, 1968).

Elijah Muhammad, Religious leader, Elijah Poole, (USA, 1897-1975).

Muhammad Ali, Boxer, Cassius Marcellus Clay (USA 1942), Adopted new name for religious reasons.

Jean Muir, Actor; Jean Muir Fullarton (New York City 13 February 1911 - 23 July 1996).

Maria Muldaur, Singer, Maria Grazia Rosa Domenica D'Amato, (New York City 12 September 1943).

Shirley Muldowney, Drag car racer, Shirley Roque, (USA, 1940).

Brian Mulroney, Prime Minister of Canada 1984-93; Martin Brian Mulroney (Baie-Comeau, Québec 20 March 1939).

Bill Mumy, Actor; Charles William Mumy, Jr. (San Gabriel, California 1 February 1954). Appeared as Billy Mumy in child roles.

Baron Munchhausen, Soldier and teller of tall tales; Karl Friedrich Hieronymus, Freiherr von Münchhausen (Bodenwerder, Germany 11 May 1720 - 22 February 1797).

Misty Mundae, Movie actor; Erin DeWright East St. Louis, Illinois 16 October 1979 She is now making films as Erin Brown.

Paul Muni, Meshilem Meier Weisenfreund, Actor, (Ukraine, 1895-1967).

Janet Munro, Actor; Janet Neilson Horsburgh (Blackpool, England 28 September 1934 - 6 December 1972). She starred in several Disney movies during the sixties.

Ona Munson, Actor, Owena Wolcott, (USA, 1906-1955).

Mardie Murie, Conservationist; Margaret Murie (Seattle, Washington 18 August 1902 - 19 October 2003).

Rupert Murdoch, Media owner, Keith Rupert Murdoch (US, discarded Australian birthright in order to expand in USA).

Brittany Murphy, Actor; Brittany Bertolotti (Atlanta, Georgia10 November 1977). Also known as Brittany Anne Murphy.

George Murphy, Actor, dancer, and politician; George Lloyd Murphy (New Haven, Connecticut 4 July 1902 - 3 May 1992).

Anne Murray, Singer; Morna Anne Murray (Springhill, Nova Scotia 20 june 1945).

Arthur Murray, Dancer; Arthur Teichman (New York 4 April 1895 - 3 March 1991 ). Other sources have Murray Teichman, Arthur Moses Teichman.

Bill Murray, Actor; William James Murray (Wilmette, Illinois 21 September 1950).

Jan Murray, television host; Murry Janofsky (Bronx, New York City 4 October 1917).

Kathryn Murray, Television dance teacher; née Kathryn Kohnfelder (Jersey City, New Jersey 15 September 1906 - 16 August 1998).

Ken Murray, Comedian, actor; Don Court (New York City 14 July 1903 - 12 October 1988).

Mae Murray, Actor; Marie Adrienne Koenig (Portsmouth, Virginia 10 May 1889 - 23 March 1965).

Edward R. Murrow, Radio and Television host (Person to Person), Egbert Roscoe Murrow, (USA, 1908-1965).

Lorenzo Music, Actor; Gerald David Music (Brooklyn 2 May 2, 1937 - 4 August 2001).

Edward Muybridge, Pioneer photographer, Edward James Muggeridge, (England, 1830-1904).

Mya, Singer and dancer; Mya Marie Harrison (Washington, DC 10 October 1979).

Dee Dee Myers, White House Press Secretary for Clinton; Margaret Jane Myers (Providence, Rhode Island 1 September 1961).