Pronounced Pron. naht-ock-dahg [key]
Means "night and day" in Swedish. This is the name of one of the oldest noble families in Sweden. The earliest known ancestor is Nils Sigridsson who lived in the 13th century. The name Natt and Dag was not mentioned until the 16th century, though, and the family members themselves didn't start using it until the 18th century. The name is believed to be a reference to the family's coat of arms which consisted of a blue and a golden field, the blue symbolising night and the gold symbolising day.