siodha

Updated: August 5, 2026

Colgan explains the term Duine Sidh thus: "Fantastical spirits," he writes, "are by the Irish called men of the Sidh, because they are seen, as it were, to come out of the beautiful hills to infest men, and hence the vulgar belief that they reside in certain subterranean habitations: and sometimes the hills themselves are called, by the Irish, Sidhe or Siodha."

- The Glories of Ireland