Niklas Natt och Dag is a member of the oldest surviving noble family in Sweden. His ancestors were responsible for the murder of the rebel Engelbrekt in 1436, commanded the army that lost Stockholm to the Danes in 1520, and were forced into exile after having demanded the abdication of Charles XIV in 1810. His surname, Natt och Dag, translates into Night and Day - the origin of this slightly unusual name is the family crest, a shield split horizontally in gold and blue. Less