Duncan
character in Shakespeare's Macbeth
Duncan
narrow gauge tank engine on animated series Thomas & Friends
Duncan Douglass
character on animated series Freakazoid
Duncan
Idaho, character in the Dune series by Frank Herbert
Duncan MacLeod
immortal hero in Highlander: The Series
Ser Duncan the Tall
character in George R.R. Martin's Tales of Dunk and Egg
Duncan
donut character in Disney's "Wreck,it Ralph"; a pun of Dunkin' Donuts
Duncan Quagmire
triplet brother of Isadora and Quigley in "A Series of Unfortunate Events"
Duncan Fletcher
main character in TV movie "My Date with the President's Daughter"
Duncan
character in movie "The Way, Way Back"
Duncan
a major character in the video game "Dragon Age"
Duncan Mckay
character on British TV series Monarch of the Glen
Duncan
the main character in novel Acceleration