Kaj

Kaj is a Scandinavian masculine name, used in Danish, Swedish, Norwegian, and Finnish, generally understood as a Nordic form of the Latin Gaius, an ancient Roman praenomen of uncertain but possibly Etruscan origin, often interpreted as meaning rejoice. The name has been in steady use across the Nordic countries for centuries and carries a distinctly Scandinavian character despite its ultimately classical roots. Related forms include Kai, which is the more widespread international variant, as well as the Latin Gaius itself.