christkingle is a bastardised version of Christkindl. Christkindl in return is a belief in Germany and other countries around (Czech Republic, Slovakia etc.) that it's the baby Jesus Christ bringing presents to children for Christmas.
Santa is in return a bastardised version of St. Nicolaus, who brings sweets and little goodies to children on 6th January, chewed, digested and spat out by the clever marketers who found a fat guy with a beard and red cloak a much better promoter of consume than the baby Jesus.