The Icelandic Yule lads bear little similarity to the world-famous Santa Claus. In contrast, the Yule Lads are the sons of two of the most hideous ogres ever known in Iceland, Grýla and Leppalúði. Each Yule Lad has its own specific characteristic that describes itself in each of their names. They appear one by one from the mountains and start arriving 13 days before Christmas to wreak minor havoc during the festive preparations. They also leave little gifts in the shoes of well-behaved children, but ill-behaved children are not as fortunate since they only get a potato in their shoes.