Complex sentence: The Knocker, Knacker, Bwca (Welsh), Bucca (Cornish) or Tommyknocker (US) is a mythical creature, the Welsh and Cornish equivalent of Irish leprechauns and English and Scottish brownies.
Split into simpler sentences: The Knocker, Knacker, Bwca (Welsh), Bucca (Cornish) or Tommyknocker (US) is a mythical creature in Welsh and Cornish folklore. They are the equivalent of Irish leprechauns and English and Scottish brownies.