Robin Goodfellow, also known as Puck or Hobgoblin, was a mischievous sprite in English folklore. It is believed he would play pranks or offer help to those who deserved it. Other synonyms for Robin Goodfellow include Brownie, Tom Thumb, Kelpie, and Imp. Each of these names has a unique origin and history in folklore and mythology. Brownies were small household spirits known for helping with tasks around the home, whilst Tom Thumb was a tiny hero who used his wit and intelligence to overcome challenges. The Kelpie was a water horse in Scottish myth, whilst Imps were malevolent creatures known for causing chaos. Each of these names offers a glimpse into the diverse range of mythical creatures found in folklore.