| Duncan | Duncan "Dick" Ebersol | Duncan "Mickey" MacKay |
| Duncan & Brady | Duncan & Fraser | Duncan & Miller |
| Duncan & Miller Glass | Duncan & Miller Glass Company | Duncan (Amazay) Lake |
| Duncan (company) | Duncan (disambiguation) | Duncan (Europeans cricketer) |
| Duncan (given name) | Duncan (horse) | Duncan (locomotive) |
| Duncan (mango) | Duncan (or MILLER) Millar | Duncan (Paul Simon song) |
| Duncan (SC) | Duncan (Slim Dusty song) | Duncan (song) |
| Duncan (surname) | Duncan (total drama island) | Duncan (Total Drama Island) |
| Duncan - Miller Glass | Duncan A. MacInnes | Duncan A. McIntyre |
| Duncan Acres | Duncan Adam Young Menzies | Duncan Adam Young Menzies, Lord Menzies |
| Duncan Airlie James | Duncan airlie james | Duncan Airport |
| Duncan Aketch Ochieng | Duncan Albert (Pretty Little Liars) | Duncan Aldred |
| Duncan Alexander | Duncan Alexander Cameron | Duncan Alexander Eliott Mackintosh |
| Duncan Alexander McNaughton | Duncan Alexander Ross | Duncan Alexander Stewart |
| Duncan Allan | Duncan Allan (cricketer) | Duncan Alwyn Macfarlane |
| Duncan and Brady | Duncan and Dolores | Duncan and Isadora Quagmire |
| Duncan and Miller | Duncan and Miller Glass | Duncan and Miller Glass Company |
| Duncan Anderson | Duncan Anderson (sportsman) | Duncan Andrew Pegg |
| Duncan Andrews | Duncan Antonio Stewart Agell | Duncan Archibald Bruce |
| Duncan Archibald Graham | Duncan Archibald Mackenzie | Duncan Armstrong |
| Duncan Arnolda | Duncan Arsenault | Duncan Atwood |
| Duncan Avoid | Duncan B. Black | Duncan B. Campbell |
| Duncan B. Forrester | Duncan Baillie | Duncan Baird |
| Duncan Baker | Duncan Ball | Duncan Ban MacIntyre |
| Duncan banatine | Duncan bannatine | Duncan Bannatyne |
| Duncan Banner | Duncan Barkes | Duncan baronets |
| Duncan Baronets | Duncan Barrett | Duncan barrett |
| Duncan Baxter | Duncan Bàn MacIntyre | Duncan Beard Site |
| Duncan Beattie | Duncan Bell | Duncan Bell (actor) |
| Duncan Bell (disambiguation) | Duncan Bell (historian) | Duncan Bell (rugby union) |
| Duncan Bell (rugby) | Duncan Birmingham | Duncan Black |
| Duncan Black MacDonald | Duncan Blaikie | Duncan Blair |
| Duncan Blair (politician) | Duncan Bluck | Duncan Bluff |
| Duncan Botwood | Duncan Bowen Black | Duncan Bowett |
| Duncan Boyd | Duncan Boyes | Duncan Bradshaw |
| Duncan Branch | Duncan Brannan | Duncan Bray |
| Duncan Brennan | Duncan Bridge | Duncan Bridgeman |
| Duncan Brinsmead | Duncan Brown | Duncan Brown Cooper |
| Duncan Browne | Duncan browne | Duncan Browne (album) |
| Duncan Bruce MacMillan | Duncan Buchanan | Duncan Burns |
| Duncan Busby | Duncan Bush | Duncan Button |
| Duncan Buyskes | Duncan Bypass | Duncan Byrnes |
| Duncan C. Heyward | Duncan C. Lee | Duncan C. Ross |
| Duncan C. Scott | Duncan Cabin | Duncan Cage |
| Duncan Calvin MacMillan | Duncan Cameron | Duncan Cameron (British Army officer) |
| Duncan Cameron (British army officer) | Duncan Cameron (Conservative MLA) | Duncan Cameron (disambiguation) |
| Duncan Cameron (fur trader) | Duncan Cameron (general) | Duncan Cameron (Liberal MLA) |
| Duncan Cameron (Manitoba Conservative) | Duncan Cameron (Manitoba politician) | Duncan Cameron (photographer) |
| Duncan Cameron (Scottish inventor) | Duncan Cameron (shinty player) | Duncan Cameron (university administrator) |
| Duncan Cameron Fraser | Duncan Campbell | Duncan Campbell (1763-1837) |
| Duncan Campbell (1763–1837) | Duncan Campbell (ancient historian) | Duncan Campbell (artist) |
| Duncan Campbell (British Army general) | Duncan Campbell (British Army officer) | Duncan Campbell (British Army officer, died 1758) |
| Duncan Campbell (British Army officer, died 1837) | Duncan Campbell (British politician) | Duncan Campbell (crime journalist) |
| Duncan Campbell (d. 1837) | Duncan Campbell (d.1837) | Duncan Campbell (died 1758) |
| Duncan Campbell (died 1837) | Duncan Campbell (disambiguation) | Duncan Campbell (inventor) |
| Duncan Campbell (investigative journalist) | Duncan Campbell (journalist) | Duncan Campbell (journalist, born 1944) |
| Duncan Campbell (MP for Ayr Burghs) | Duncan Campbell (MP) | Duncan Campbell (musician) |
| Duncan Campbell (politician) | Duncan Campbell (revivalist) | Duncan Campbell (Scottish politician) |
| Duncan Campbell (settler) | Duncan Campbell (singer) | Duncan Campbell (snooker player) |
| Duncan Campbell (snowboarder) | Duncan Campbell (soldier) | Duncan Campbell (soothsayer) |
| Duncan Campbell (The Guardian) | Duncan Campbell (trumpeter) | Duncan Campbell (UB40) |
| Duncan Campbell (UK politician) | Duncan Campbell (Unionist MP) | Duncan Campbell (Unionist politician) |
| Duncan Campbell Francis Moodie | Duncan Campbell of Glenorchy | Duncan Campbell of Lochawe |
| Duncan Campbell of Sandaig | Duncan Campbell Ross | Duncan Campbell Scott |
| Duncan Campbell, 1st Lord Campbell | Duncan Campbell, the 1st Lord Campbell | Duncan Campell of Glenorchy |
| Duncan Canal | Duncan Canal (Alaska) | Duncan Canal (Louisiana) |
| Duncan Canal (volcanic field) | Duncan Canal volcanic field | Duncan Canal Volcanic Field |
| Duncan Canal, Alaska | Duncan Canal, Louisiana | Duncan Candler |
| Duncan Capps | Duncan Carmello | Duncan Carmichael |
| Duncan Carmichael (cricketer) | Duncan Carse | Duncan Carter |
| Duncan Carter-Campbell of Possil | Duncan Casey | Duncan Catterall |
| Duncan Causeway | Duncan Cedar | Duncan Cederman |
| Duncan Cementers | Duncan Chapin Lee | Duncan Chaplin Lee |
| Duncan Chapman | Duncan Charles Baker | Duncan Charles Home |
| Duncan Cheatle | Duncan Cheruiyot Koech | Duncan Chessell |
| Duncan Chisholm | Duncan Chiu | Duncan Chiu Tat-kun |
| Duncan Chow | Duncan chow | Duncan Church |
| Duncan Clark | Duncan Clark (athlete) | Duncan Clark (disambiguation) |
| Duncan Clark (surgeon) | Duncan class (1859) | Duncan class battleship |
| Duncan class battleship (1901) | Duncan class ship of the line (1859) | Duncan Cleworth |
| Duncan Clinch | Duncan Clinch Heyward | Duncan Coffee Company |
| Duncan Cole | Duncan college | Duncan College |
| Duncan College (Rice University) | Duncan Colquhoun | Duncan Convers |
| Duncan Cooper | Duncan Cooper (cricketer) | Duncan Cooper (disambiguation) |
| Duncan Cooper (footballer) | Duncan Cooper (painter) | Duncan coral |
| Duncan Coral | Duncan Coutts | Duncan Cowan Ferguson |
| Duncan Crabtree-Ireland | Duncan Cramer | Duncan Creek |
| Duncan Creek (Crooked Creek tributary) | Duncan Creek (Crooked Creek) | Duncan Creek (disambiguation) |
| Duncan Creek (Gasconade River tributary) | Duncan Creek (Gasconade River) | Duncan Creek (Little Osage River tributary) |
| Duncan Creek (Little Osage River) | Duncan Crowie | Duncan Cumming |
| Duncan Cummings | Duncan Currie | Duncan Curry |
| Duncan D Hunter | Duncan d hunter | Duncan D. Cameron |
| Duncan D. Hunter | Duncan Dalmao | Duncan Dam |
| Duncan dance | Duncan Dance | Duncan Daniel (artist) |
| Duncan Daniel McLean | Duncan Daniels | Duncan Daniels (artist) |
| Duncan Dares | Duncan David Elias | Duncan Davidson |
| Duncan Davidson (1733-1799) | Duncan Davidson (1733–1799) | Duncan Davidson (businessman) |
| Duncan Davidson (Cromartyshire MP, born 1733) | Duncan Davidson (Cromartyshire MP, born 1800) | Duncan Davidson (died 1881) |
| Duncan Davidson (disambiguation) | Duncan Davidson (footballer) | Duncan Davies Medal |
| Duncan Dawkins | Duncan Dayton | Duncan de Kergommeaux |
