The name Santa Claus is derived from Sinterklaas, the Dutch name for the character based on St. Nicholas. He is also known there by the name of Sint Nicolaas which explains the use of the two fairly dissimilar names Santa Claus and Saint Nicholas or St. Nick. may be it is unsourced. But removing it simply it not good. Read the policy of good faith, then edit wikipedia. This information can be useful to many.