The crossword solution for the term 'Santa Nickname' is 'Kris, ' which is a four-letter word. Kris is a shortened version of the name 'Kristopher, ' which is a variation of the name 'Christopher.' The name Christopher is derived from the Greek words 'Christos, ' meaning 'CHRIST, ' and 'phero, ' meaning 'to bear.' This nickname is often associated with Santa Claus, as it is believed to be the name of the original Saint Nicholas.