Daniel Francis Galouye was an American science fiction writer. During the 1950s and 1960s, he contributed novelettes and short stories to various digest size science fiction magazines, sometimes writing under the pseudonym Louis G. Daniels.

Daniel Gregory Mason was an American composer and music critic.

Daniel Webster was an American lawyer and statesman who represented New Hampshire and Massachusetts in the U.S. Congress and served as the 14th and 19th U.S. Secretary of State under Presidents William Henry Harrison, John Tyler, and Millard Fillmore. Webster was one of the most prominent American lawyers of the 19th century, arguing over 200 cases before the United States Supreme Court in his career. During his life, Webster had been a member of the Federalist Party, the National Republican Party, and the Whig Party. He was among the three members of the Great Triumvirate along with Henry Clay and John C. Calhoun.

Danske Dandridge was a Danish-born American poet, historian, and garden writer. Along with her contemporaries, Waitman T. Barbe and Thomas Dunn English, Dandridge was considered a major poet of late 19th-century West Virginia.

Dante Alighieri, most likely baptized Durante di Alighiero degli Alighieri and often referred to as Dante, was an Italian poet, writer and philosopher. His Divine Comedy, originally called Comedìa and later christened Divina by Giovanni Boccaccio, is widely considered one of the most important poems of the Middle Ages and the greatest literary work in the Italian language.

Gabriel Charles Dante Rossetti, generally known as Dante Gabriel Rossetti, was an English poet, illustrator, painter, translator and member of the Rossetti family. He founded the Pre-Raphaelite Brotherhood in 1848 with William Holman Hunt and John Everett Millais. Rossetti inspired the next generation of artists and writers, William Morris and Edward Burne-Jones in particular. His work also influenced the European Symbolists and was a major precursor of the Aesthetic movement.

David Ames Wells was an American engineer, textbook author, economist and advocate of low tariffs.

Sir David Brewster KH PRSE FRS FSA Scot FSSA MICE was a British scientist, inventor, author, and academic administrator. In science he is principally remembered for his experimental work in physical optics, mostly concerned with the study of the polarization of light and including the discovery of Brewster's angle. He studied the birefringence of crystals under compression and discovered photoelasticity, thereby creating the field of optical mineralogy. For this work, William Whewell dubbed him the "father of modern experimental optics" and "the Johannes Kepler of optics."

David Christie Murray was an English journalist, who also wrote fiction.

David Dudley Field II was an American lawyer and law reformer who made major contributions to the development of American civil procedure. His greatest accomplishment was engineering the move away from common law pleading towards code pleading, which culminated in the enactment of the Field Code in 1850 by the state of New York.