Encyclopedias, Almanacs, Transcripts, and Maps
- Dufferin and Ava, Frederick Temple Hamilton-Temple-Blackwood, 1st marquess of
- Dufour, Guillaume Henri
- Dufourspitze
- Duggah
- Duguay-Trouin, René
- Duhamel du Monceau, Henri Louis
- Duhem, Pierre Maurice Marie
- Dühring, Eugen Karl
- Duke of York Islands
- Duke University
- Dulbecco, Renato
- Duluth, Daniel Greysolon, sieur
- Dumaguete
- Dumah
- Dumas fils
- Dumas père
- Dumas, Thomas-Alexandre
- Dumba, Konstantin Theodor
- Dumfriesshire
- Dummer, Jeremiah (c.1680–1739, colonial agent for Massachusetts and Connecticut)