>The popular conception of Santa Claus originates from folklore traditions surrounding the 4th-century Christian bishop Saint Nicholas, the patron saint of children.
They have us singing songs calling him a jolly saint.
"Old Nick" is an informal, jocular, or old-fashioned name for the Devil or Satan,used as a euphemism for the chief spirit of evil, with synonyms like Lucifer, Beelzebub, and the Tempter. It's a colloquial term that appears in phrases like "play old Nick" (meaning to cause trouble) and historically referred to the broad arrows on convict uniforms as "Old Nick's footsteps".