Caj

Caj is a Swedish masculine given name, likely a variant or phonetic adaptation of the Latin-rooted name Caius, which derives from an ancient Roman praenomen of uncertain but possibly Etruscan origin, often associated with the Latin verb gaudere, meaning to rejoice. It functions as a simplified spelling suited to Scandinavian phonology. Related forms include Kaj, the more widespread Nordic variant, as well as the classical Caius and its anglicized form Gaius.