A woman leaving yule porridge for the tomtar.

Finnish tomte-themed Yule postcard with a view of Wiborg.

The Knocker, Knacker, Bwca (Welsh), Bucca (Cornish) or Tommyknocker (US) is a mythical creature in Welsh, Cornish and Devon folklore. It is closely related to the Irish leprechaun or clurichaun, Kentish kloker and the English and Scottish brownie. The Cornish described the creature as a little person two feet tall, with a big head, long arms, wrinkled face, and white whiskers. It wears a tiny version of standard miner's garb and commits random mischief, such as stealing miners' unattended tools and food.