Diderik (also Diederik, Dederik) is a male given name, the Low German and Low Franconian form of High German Dietrich. In North Germanic languages, the native form would be Tjodrik, but Diderik has been loaned from Low German and is now a common name also in Scandinaiva. See Theodoric for the origin and history of the name.
Common short forms of the name are Dirk, Derek and Derick.
People called Diderik:
Diderik Bøgvad (1792–1857), Norwegian politician
Diderik Batens (born 1944), Belgian logician and epistemologist at the University of Ghent
Diderik Hegermann (1763–1835), the Norwegian councillor of state and Minister of the Army
Diderik Iversen Tønseth (1818–1893), Norwegian politician for the Liberal Party
Diderik Schnitler (born 1946), Norwegian businessperson
Diderik Wagenaar (born 1946), Dutch composer and musical theorist
Johannes Diderik van der Waals (1837–1923), Dutch physicist and thermodynamicist
Morten Diderik Emil Lambrechts (1824–1900), Norwegian jurist and politician
Fethry Duck, a fictional cartoon character known in Dutch as Diederik
