Déor Elf-friend

Human minstrel of the city of Kortirion, and father of Ælfwine (Eldairon), in J.R.R. Tolkien's "The History of Eriol or Ælfwine and the End of the Tales," collected into The Book of Lost Tales Part Two (1984). It's an early version of some of the history of Middle-Earth that then got rewritten and de-canonized.

Tolkien deliberately linked his fictional version to a historical character (who may actually also be fictional, the jury's still out), named Deor.