Namesakes
Donnchad I the Gracious
(a.k.a. Duncan) (m) c. 1001-1040 
Scottish Kings and Queens 1034-1040
Shakespearian Characters (Duncan) Macbeth
Duncan Haldane
(m) 1951-
Nobel Prize Winners 2016 (physics)
Notable Scientists and Inventors
Duncan Laurence
(m) 1994-
Eurovision Song Contest Winners 2019 Netherlands
Notable Musicians
Donnchad II
(a.k.a. Duncan) (m) c. 1060-1094
Scottish Kings and Queens 1094
Leopold, Duke of Albany
(a.k.a. Duncan) (m) 1853-1884
Other Royalty 1853-1884 United Kingdom (prince)
Jeffrey Jones
(a.k.a. Duncan) (m) 1946-
Notable Actors and Entertainers (actor)
Robert Duncan McNeill
(m) 1964-
Notable Actors and Entertainers (actor)
Duncan Keith
(m) 1983-
Olympic Medalists 2010; 2014 ice hockey (gold)
Duncan McNaughton
(m) 1910-1998
Olympic Medalists 1932 high jump (gold)
Dunc Munro
(m) 1901-1958
Olympic Medalists 1924 ice hockey (gold)
Duncan M. White
(m) 1918-1998
Olympic Medalists 1948 400 m hurdles (silver)
Duncan Armstrong
(m) 1968-
Olympic Medalists 1988 swimming - 200 m freestyle; swimming - 400 m freestyle (gold/silver)
Duncan Goodhew
(m) 1957-
Olympic Medalists 1980 swimming - 100 m breaststroke; swimming - 4x100 m medley relay (gold/bronze)
Duncan Regehr
(m) 1952-
Notable Actors and Entertainers (actor)
Duncan Gillis
(m) 1883-1963
Olympic Medalists 1912 hammer throw (silver)
Mickey MacKay
(a.k.a. Duncan) (m) 1894-1940
Hall-of-Famers 1952 (ice hockey)
Duncan Weir
(m) 1991-
Notable Athletes (rugby)
Hamish Rutherford
(a.k.a. Duncan) (m) 1989-
Notable Athletes (cricket)
Duncan Kane
(m)
Fictional Characters from Television 2004 Veronica Mars