What does the word Erl mean?

Usage examples for Erl

  1. In later years he arranged many of Schubert's songs in a truly beautiful way for the piano,- songs like the " Erl King," " Thou Art My Peace," " Hark, Hark the Lark." – Child's Own Book of Great Musicians: Liszt by Thomas Tapper
  2. It is Goethe's " Erl King." – Story-Lives of Great Musicians by Francis Jameson Rowbotham