- De Geer, Louis Gerhard, Baron
- Deggendorf
- De Haas, Mauritz Frederick Hendrick
- Dehra
- Dehra Dun
- Deioces
- Deïotarus
- Deir
- Deira
- Deism
- Deister
- Déjazet, Pauline Virginie
- De Kalb
- De Keyser, Thomas
- Dekker, Edward Douwes
- Dekker, Jeremias de
- Dekker, Thomas
- De la Beche, Sir Henry Thomas
- Delaborde, Henri François
- Delacroix, Ferdinand Victor Eugène
- De la Gardie, Magnus Gabriel, Count
- Delagoa Bay
- Delambre, Jean Baptiste Joseph
- Delamere, George Booth, 1st Baron
- De Land
- Delane, John Thadeus
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- Delany, Mary Granville
- De la Rey, Jacobus Hercules
- De la Rive, Auguste Arthur
- Delaroche, Hippolyte
- Delarue, Gervais
- De la Rue, Warren
- Delator
- Delaunay, Elie
- Delaunay, Louis Arsène
- Delavigne, Jean François Casimir
- Delaware (state)
- Delaware (Ohio)
- Delaware Indians
- Delaware River
- Delaware Water-Gap
- De la Warr
- Delbrück, Hans
- Delbrück, Martin Friedrich Rudolf von
- Delcassé, Théophile
- Del Credere
- Delescluze, Louis Charles
- Delesse, Achille Ernest Oscar Joseph
- Delessert, Jules Paul Benjamin
- Delfico, Melchiorre
- Delft
- Delhi
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- Delia
- Delian League
- Delibes, Clément Philibert Léo
- Delilah
- Delille, Jacques
- Delirium
- Delisle, Joseph Nicolas
- Delisle, Léopold Victor
- Delitzsch, Franz
- Delitzsch
- Delius, Nikolaus
- Della Bella, Stefano
- Della Casa, Giovanni
- Della Colle, Raffaellino
- Della Gherardesca, Ugolino
- Della Porta, Giovanni Battista
- Della Quercia, Jacopo
- Della Robbia
- Delmedigo
- Delmenhorst
- Delolme, Jean Louis
- Deloney, Thomas
- De Long, George Washington
- Delorme, Marion
- De L'Orme, Philibert
- Delos
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