Half-elf

Half-elves are an oddity. Everyone knows they exist, but often to see one up close is to cause scrutiny. Half-elves in England are not their own race that breeds true, they are the result of human/sidhe pairings. Often Knights in Arthur's time would form their own houses by taking a Sidhe or Faerie as their bride (Although the korred are different in nature). The practice continues through the Anglo-Saxon kingdoms, but stops after William conquers England.

Half-elves are individuals, mostly, and not populations. To see one, though, the common people think it's a sign of good luck. This is not lost on the Half-elves, however, and they tend to be ambassadors between the world of the fae and the world of Men.