Diego de Torres Villarroel was a Spanish writer, poet, dramatist, doctor, mathematician, priest and professor of the University of Salamanca. His most famous work is his autobiography, Vida, ascendencia, nacimiento, crianza y aventuras del Doctor Don Diego de Torres Villarroel.

Diego Hurtado de Mendoza, Spanish novelist, poet, diplomat and historian, born in Granada in late 1503 or early 1504.

Diego Armando Maradona was an Argentine professional football player and manager. Widely regarded as one of the greatest players in the history of the sport, he was one of the two joint winners of the FIFA Player of the 20th Century award.

Diego Marani is an Italian novelist and European civil servant.

Diego Valeri was an Italian poet and literary critic.

Dieter Geuenich is a German historian who specializes in the history of Germanic peoples.

Sir Dieter Robin Helm is a British economist and academic.

Dieter Henrich was a German philosopher. A contemporary thinker in the tradition of German idealism, Henrich is considered "one of the most respected and frequently cited philosophers in Germany today", whose "extensive and highly innovative studies of German Idealism and his systematic analyses of subjectivity have significantly impacted on advanced German philosophical and theological debates."

Dieter Hildebrandt was a German Kabarett artist.

Dieter Kalka is a German writer, songwriter, poet, dramatist, musician, editor, translator and speech therapist.