There is also the poem by Goethe, "Der Erlkönig". Although a literal translation would be The Alder King, it is usually translated to English as The Elf King.

There is also the poem by Goethe, "Der Erlkönig". Although a literal translation would be The Alder King, it is usually translated to English as The Elf King. Alder King does fit with the traditional idea of elves/faeries as non human spirits or supernatural beings associated with nature, who sometimes spirit away mortals to live in the fairy realm. According to Wikipedia, the idea for the poem is believed to trace back to a Danish story about an Elf King. And Elf King in Danish sounds a bit like Alder King in German.