David Eugene Smith was an American mathematician, educator, and editor.

David Garnett was an English writer and publisher. As a child, he had a cloak made of rabbit skin and thus received the nickname "Bunny", by which he was known to friends and intimates all his life.

David Loeb Goodis was an American writer of crime fiction noted for his output of short stories and novels in the noir fiction genre. Born in Philadelphia, Goodis alternately resided there and in New York City and Hollywood during his professional years. According to critic Dennis Drabelle, "Despite his [university] education, a combination of ethnicity (Jewish) and temperament allowed him to empathize with outsiders: the working poor, the unjustly accused, fugitives, criminals."

David Graham Phillips was an American novelist and journalist of the muckraker tradition.

David Peter Gray is a British singer-songwriter. He released his first album in 1993 and received worldwide attention after the release of White Ladder six years later. White Ladder was the first of three UK chart-toppers in six years for Gray; it became the fifth best-selling album of the 2000s in the UK and ranked as the tenth best-selling album of the 21st century in the United Kingdom in October 2019. Gray is also known for the hit single "Babylon" from the White Ladder album. He has received four Brit Award nominations, including two nominations for Best British Male.

David Henry Keller was an American writer who worked for pulp magazines in the mid-twentieth century, in the science fiction, fantasy, and horror genres. He was also a psychiatrist and physician to shell-shocked soldiers during World War I and World War II, and his experience treating mentally ill people is evident in some of his writing, which contains references to mental disorders. He initially wrote short stories as a hobby and published his first science fiction story in Amazing Stories in 1928. He continued to work as a psychiatrist while publishing over sixty short stories in science fiction and horror genres. Technically, his stories were not well-written, but focused on the emotional aspects of imaginative situations, which was unusual for stories at the time.

David Hay Fleming, LL.D. (1849–1931) was a Scottish historian and antiquary.

David Hume was a Scottish Enlightenment philosopher, historian, economist, librarian, and essayist, who is best known today for his highly influential system of philosophical empiricism, skepticism, and naturalism. Beginning with A Treatise of Human Nature (1739–40), Hume strove to create a naturalistic science of man that examined the psychological basis of human nature. Hume argued against the existence of innate ideas, positing that all human knowledge derives solely from experience. This places him with Francis Bacon, Thomas Hobbes, John Locke, and George Berkeley as an empiricist.

David Lester Richardson was an officer of the East India Company, who throughout his life followed literary pursuits as a poet and periodical writer, and as editor and proprietor of literary journals. A skilled linguist, he was in later life an educator, serving as professor of English at Hindu College, where he inspired the Bengali poet Michael Madhusudan Dutta.

David Lindsay was a Scottish author best remembered for the philosophical science fiction novel A Voyage to Arcturus (1920).