D
- Jacques Daguerre — Daguerreotype
- Anders Dahl (1751–1789) — Dahlia
- Gottlieb Daimler and Karl Benz — Daimler-Benz (later DaimlerChrysler)
- Dalek — Popular nickname for the Bridgewater Place, Dalekmania
- John Dalton — dalton, non-SI unit of atomic mass, Daltonism
- Pedro Damiano — Damiano Defence
- Glenn Danzig -- Danzig, founder of the Heavy Metal band Danzig
- Charles Darwin — Darwinism, Neural Darwinism, Social Darwinism, Darwinian Happiness, Darwin's theory of evolution, Darwinian selection, Non-darwinian evolution, Darwinian medicine, Darwin's Dangerous Idea, Darwin, Northern Territory, Darwin Mounds, Charles Darwin University, Darwin College, Cambridge, Charles Darwin National Park, Adelaide-Darwin railway, Darwin Awards, Darwin's finches, Darwin Island, Charles Darwin Research Station, Darwin Bay, Lecocarpus darwinii (a tree species) in (Galápagos Islands), Charles Darwin Foundation
- Adi Dassler — founder of adidas
- Arthur Davidson and William Harley — Harley-Davidson
- Humphry Davy — Davy lamp
- Richard Dawkins — Dawkinsia, Richard Dawkins Award
- Paul de Casteljau — de Casteljau's algorithm
- Michael Dell — founder of Dell, the computer company
- Delmonico, America's first restaurant — Delmonico steak (boneless Prime rib)
- David Eisenhower, grandson of US President Dwight Eisenhower — Camp David US presidential retreat
- Thomas Derrick (c. 1600), British hangman — Derrick (lifting device)
- Melvil Dewey — Dewey Decimal System
- Thomas Edmund Dewey, American politician — Dewey, one of "Huey, Dewey and Louie", animated cartoon characters
- David Deutsch — Church-Turing-Deutsch Principle
- Bo Diddley — Popularizer of the Bo Diddley beat
- Rudolf Diesel — the diesel engine
- Paul Dirac — Dirac fermion, Dirac spinor, Dirac equation, Dirac delta function, Dirac sea, Dirac Prize, Fermi-Dirac statistics
- Walt Disney — founder, The Walt Disney Company, Disneyland
- Jeremiah Dixon and Charles Mason — Mason-Dixon Line
- John Francis Dodge and Horace Dodge - founders, Dodge
- Doily family (c. 1700)
- Ray Dolby — Dolby Stereo, Dolby Surround and Dolby Pro Logic
- Donatello, Renaissance painter — Donatello, one of the Teenage Mutant Ninja Turtles comic characters
- Christian Doppler — Doppler radar, Doppler effect
- Donald Wills Douglas, Sr. — Douglas Aircraft Company
- Charles Dow and Edward Jones — Dow Jones & Company
- Herbert Dow — The Dow Chemical Company
- John Langdon Down, English physician - Down's Syndrome
- Robin Dunbar — Dunbar's number
- Guillaume Dupuytren — Dupuytren's contracture, Dupuytren's fracture
- Dr. August Dvorak — Dvorak Simplified Keyboard
- Draco (lawgiver) - Draconian laws
- Henry Draper - Draper (crater), lunar impact crater
- John William Draper- Draper point, 977˚ F (525˚ C, 798 K)
Read more about this topic: List Of Eponyms (A-K)