Also very relevant - he is puck, basically. "Hob" was a shortened form of "robin" in medieval times and this links the Hobs of northern lore with Bu - also of relevance here is the word "hobgoblin", and the fact that Robin Goodfellow was said to be the king of the Hobs.

http://www.sacred-texts.com/neu/celt/tfm/tfm124.htm