Derenik Karapeti Demirchian was a Soviet and Armenian writer, novelist, poet, translator and playwright.

Derk Bodde was an American sinologist and historian of China known for his pioneering work on the history of the Chinese legal system.

Derk Pereboom is the Susan Linn Sage Professor in Philosophy and Ethics at Cornell University. He specializes in free will and moral responsibility, philosophy of mind, philosophy of religion, and the work of Immanuel Kant.

Dermot Bolger is an Irish novelist, playwright, poet and editor from Dublin, Ireland. Born in the Finglas suburb of Dublin in 1959, his older sister is the writer June Considine. Bolger's novels include Night Shift (1982), The Woman's Daughter (1987), The Journey Home (1990), Father's Music (1997), Temptation (2000), The Valparaiso Voyage (2001) and The Family on Paradise Pier (2005). He is a member of the artist's association Aosdána.

Dermot Healy was an Irish novelist, playwright, poet and short story writer. A member of Aosdána, Healy was also part of its governing body, the Toscaireacht. Born in Finea, County Westmeath, he lived in County Sligo, and was described variously as a "master", a "Celtic Hemingway" and as "Ireland's finest living novelist".

Dermot Keogh is Professor of History and Emeritus Jean Monnet Professor of European Integration Studies at University College, Cork.

Dermot Moran is an Irish philosopher specialising in phenomenology and in medieval philosophy, and he is also active in the dialogue between analytic and continental philosophy. He is currently the inaugural holder of the Joseph Chair in Catholic Philosophy at Boston College. He is a member of the Royal Irish Academy and a founding editor of the International Journal of Philosophical Studies.

Derrick Jensen is an American ecophilosopher, writer, author, teacher and environmentalist in the anarcho-primitivist tradition, though he rejects the label "anarchist". Utne Reader named Jensen among "50 Visionaries Who Are Changing the World" in 2008, and Democracy Now! says that he "has been called the poet-philosopher of the ecology movement".

Derrick Corson Niederman is an author, mathematician, game designer, and national squash champion. His most recent game, 36 Cube, has been described by Reuters as "a wolf in sheep's clothing" because its simple design belies the sophisticated mathematical intuition required for the solution. He received a B.A. in mathematics from Yale and a Ph.D. in mathematics from MIT. Dr. Niederman is a math professor at the College of Charleston.

Derviš Sušić was a Bosnian writer, known best for his first work I, Danilo. His political affiliations and life path had a significant impact on the themes of his literary works.