Elegast is the hero and noble robber in the poem Karel ende Elegast, an early Middle Dutch epic poem that has been translated into English as Charlemagne and Elbegast. In the poem, he possibly represents the King of the Elves. He appears as a knight on a black horse, an outcast vassal of Charlemagne living in the forest. The original Dutch poem uses the name Elegast, while translated versions of the poem commonly use the name Elbegast in German and English, or Alegast in the Scandinavian ballad.

Folklore of the Low Countries, often just referred to as Dutch folklore, includes the epics, legends, fairy tales and oral traditions of the people of Belgium, Netherlands and Luxembourg. Traditionally this folklore is written or spoken in Dutch or in one of the regional languages of these countries.