Diderik or Didrik is a Norwegian male given name. In North Germanic languages, the native form would be Tjodrik, but Diderik and Didrik have been loaned from Low German and are now a common name in Norway. It may also be a variant of the related Dutch name Diederik. People with the name include:

Diderik
GenderMale
Language(s)Norwegian
Origin
Word/nameFrom Theodoric
Other names
Alternative spellingDidrik
Related namesDiederik