Philosophers (and others important in the history of philosophy), listed alphabetically:
Note: This list has a minimal criterion for inclusion and the relevance to philosophy of some individuals on the list is disputed.
D
Jean le Rond d'Alembert (1717–1783) Damascius (c. 462–540) Peter Damian (c. 1007–1072) Hubert Damisch (1928–2017) Arthur Danto (1924–2013) Charles Darwin (1809–1882) Erasmus Darwin (1731–1802) David of Dinant (12th century) David the Invincible (late 6th century) Donald Davidson (1917–2003) Angela Davis (born 1944) Jalal al-Din al-Dawani (1426–1502) Simone de Beauvoir (1908–1986) Bruno de Finetti (1906–1985) Joseph de Maistre (1753–1821) Paul de Man (1919–1983) Augustus De Morgan (1806–1871) Francesco de Sanctis (1817–1883) Guy Debord (1931–1994) Régis Debray (born 1940) Richard Dedekind (1831–1916) Joseph Déjacque (1821–1865) Gilles Deleuze (1925–1995) Bernard Delfgaauw (1912–1993) Elijah Delmedigo (1460–1497) Giorgio Del Vecchio (1878–1970) Democritus (460–370 BC) Alain Deneault (born 1970) Daniel Dennett (born 1942) Denys the Carthusian (or Denys de Leeuwis) (1402–1471) Jacques Derrida (1930–2004) René Descartes (1596–1650) Vincent Descombes (born 1943) Robert Desgabets (1610–1678) Antoine Destutt de Tracy (1754–1836) Paul Deussen (1845–1919) Alejandro Deustua (1849–1945) John Dewey (1859–1952) Dharmakirti (c. 7th century) Albert Venn Dicey (1835–1922) Denis Diderot (1713–1784) Dietrich of Freiberg (13th century) Joseph Dietzgen (1828–1888) Kenelm Digby (1603–1665) Dignaga (c. 480–c. 540) Wilhelm Dilthey (1833–1911) Hugo Dingler (1881–1954) Diodorus Cronus (3rd century BC) Diogenes Laërtius (3rd century) Diogenes of Apollonia (c. 460 BC) Diogenes of Babylon (c. 230–c. 150/140 BC) Diogenes of Oenoanda (2nd century) Diogenes the Cynic of Sinope (412–323 BC) Dogen Zenji (or Dōgen Kigen) (1200–1253) Dong Zhongshu (or Tung Chung-shu) (c. 176–c. 104) Herman Dooyeweerd (1894–1977) Fyodor Dostoyevsky (1821–1881) Frederick Douglass (1818–1895) Fred Dretske (1932–2013) Hans Adolf Eduard Driesch (1867–1941) W. E. B. Du Bois (1868–1963) Emil du Bois-Reymond (1818–1896) Jean-Baptiste Dubos (1670–1742) Émilie du Châtelet (1706–1749) Guillaume du Vair (1556–1621) Curt Ducasse (1881–1969) Pierre Duhem (1861–1916) Eugen Dühring (1833–1921) Michael Dummett (1925–2011) Raya Dunayevskaya (1910–1987) James Dunbar (1742–1798) Duns Scotus (c. 1266–1308) Profiat Duran (or Efodi or Isaac ben Moses Levi) (c. 1349–c. 1414) Simeon ben Zemah Duran (or Rashbaz) (1361–1444) Durandus of St. Pourçain (c. 1275–1334) Will Durant (1885–1981) Émile Durkheim (1858–1917) Enrique Dussel (born 1934) Andrea Dworkin (1946–2005) Ronald Dworkin (1931–2013)
E
Jonathan Earle (born 1970) John Earman (born 1942) Johann Augustus Eberhard (1739–1809) Meister Eckhart (1260–1327/8) Umberto Eco (1932–2016) Arthur Stanley Eddington (1882–1944) Jonathan Edwards (1703–1758) Paul Edwards (1923–2004) Christian von Ehrenfels (1856–1932) Albert Einstein (1879–1955) Mircea Eliade (1907–1986) Elias (6th century) George Eliot (1819–1880) T. S. Eliot (1888–1965) Elisabeth of Bohemia (1618–1680) Jon Elster (born 1940) Ralph Waldo Emerson (1803–1882) Empedocles (490 BC–430 BC) Friedrich Engels (1820–1895) Epicharmus (c. 540–450 BC) Epictetus (AD 55–c. 135) Epicurus (341 BC–270 BC) Desiderius Erasmus (1466–1536) Johannes Scotus Eriugena (c. 800–c. 880) Rudolf Christoph Eucken (1846–1926) Eudoxus of Cnidus (410/408 BC–355 or 347 BC) Eusebius of Caesarea (264–339) Gareth Evans (1946–1980)