The Dutch word “Sinterklaas” for St. Nicholas evolved into the English “Santa Claus,” thanks in part to a New York City printer, William Gilley, who published an anonymous poem referring to “Santeclaus” in a children’s book in 1821. The poem was also the first mention of a character based on St. Nicholas having a sleigh, in this case pulled by a single reindeer.
http://history1800s.about.com/od/entertainmentsport/a/christmas19thc.htm